ran into this again, this time on one group member only instead of the whole group (whew)
here is more logs and context before the issue:
I1224 16:41:31.849022 1 log.go:34] L0 was stalled for 31.524s
I1224 16:41:32.699105 1 draft.go:915] Proposal with key: 18288822768274597043 already applied. Skipping index: 1673742. Delta: txns:<start_ts:2287950 commit_ts:2288020 > tx
I1224 16:41:32.700345 1 draft.go:915] Proposal with key: 18288822768274597046 already applied. Skipping index: 1673746. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.701011 1 draft.go:915] Proposal with key: 18288822768274597043 already applied. Skipping index: 1673748. Delta: txns:<start_ts:2287950 commit_ts:2288020 > tx
I1224 16:41:32.701871 1 draft.go:915] Proposal with key: 18288822768274597047 already applied. Skipping index: 1673751. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.703620 1 draft.go:915] Proposal with key: 18288822768274597046 already applied. Skipping index: 1673756. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.704166 1 draft.go:915] Proposal with key: 18288822768274597048 already applied. Skipping index: 1673757. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.705603 1 draft.go:915] Proposal with key: 18288822768274597049 already applied. Skipping index: 1673759. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.705908 1 draft.go:915] Proposal with key: 18288822768274597050 already applied. Skipping index: 1673760. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.706153 1 draft.go:915] Proposal with key: 18288822768274597051 already applied. Skipping index: 1673761. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.708291 1 draft.go:915] Proposal with key: 18288822768274597044 already applied. Skipping index: 1673743. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.708315 1 draft.go:915] Proposal with key: 18288822768274597045 already applied. Skipping index: 1673745. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.708328 1 draft.go:915] Proposal with key: 18288822768274597044 already applied. Skipping index: 1673749. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.708336 1 draft.go:915] Proposal with key: 18288822768274597045 already applied. Skipping index: 1673750. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.712847 1 draft.go:915] Proposal with key: 18288822768274597053 already applied. Skipping index: 1673783. Delta: txns:<start_ts:2287769 > txns:<start_ts:22843
I1224 16:41:32.713736 1 draft.go:915] Proposal with key: 18288822768274597054 already applied. Skipping index: 1673785. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.715434 1 draft.go:915] Proposal with key: 18288822768274597055 already applied. Skipping index: 1673788. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.738477 1 draft.go:915] Proposal with key: 14419583477275073265 already applied. Skipping index: 1673792. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.742548 1 draft.go:1321] Blocked pushing to raft node applyCh for 15.121s
I1224 16:41:32.760963 1 draft.go:915] Proposal with key: 18288822768274597077 already applied. Skipping index: 1673829. Delta: txns:<start_ts:2288010 > txns:<start_ts:22880
I1224 16:41:32.761854 1 draft.go:915] Proposal with key: 18288822768274597078 already applied. Skipping index: 1673831. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.771756 1 draft.go:915] Proposal with key: 18288822768274597080 already applied. Skipping index: 1673843. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.772883 1 draft.go:915] Proposal with key: 18288822768274597082 already applied. Skipping index: 1673845. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.776450 1 draft.go:915] Proposal with key: 18288822768274597084 already applied. Skipping index: 1673852. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.777146 1 draft.go:915] Proposal with key: 18288822768274597086 already applied. Skipping index: 1673854. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.777766 1 draft.go:915] Proposal with key: 18288822768274597087 already applied. Skipping index: 1673855. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.778627 1 draft.go:915] Proposal with key: 18288822768274597088 already applied. Skipping index: 1673856. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.780834 1 draft.go:915] Proposal with key: 18288822768274597089 already applied. Skipping index: 1673859. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.782344 1 draft.go:915] Proposal with key: 18288822768274597090 already applied. Skipping index: 1673861. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.783819 1 draft.go:915] Proposal with key: 18288822768274597091 already applied. Skipping index: 1673863. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.786879 1 draft.go:915] Proposal with key: 18288822768274597092 already applied. Skipping index: 1673867. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.788827 1 draft.go:915] Proposal with key: 18288822768274597093 already applied. Skipping index: 1673870. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.789957 1 draft.go:915] Proposal with key: 18288822768274597094 already applied. Skipping index: 1673872. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.791901 1 draft.go:915] Proposal with key: 18288822768274597095 already applied. Skipping index: 1673875. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.792583 1 draft.go:915] Proposal with key: 18288822768274597096 already applied. Skipping index: 1673876. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.793938 1 draft.go:915] Proposal with key: 18288822768274597097 already applied. Skipping index: 1673878. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.795227 1 draft.go:915] Proposal with key: 18288822768274597098 already applied. Skipping index: 1673880. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.797911 1 draft.go:915] Proposal with key: 18288822768274597100 already applied. Skipping index: 1673884. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.798537 1 draft.go:915] Proposal with key: 18288822768274597099 already applied. Skipping index: 1673885. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.802227 1 draft.go:915] Proposal with key: 18288822768274597101 already applied. Skipping index: 1673891. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.802873 1 draft.go:915] Proposal with key: 18288822768274597102 already applied. Skipping index: 1673892. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.807132 1 draft.go:915] Proposal with key: 18288822768274597103 already applied. Skipping index: 1673899. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.808630 1 draft.go:915] Proposal with key: 18288822768274597104 already applied. Skipping index: 1673900. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.814762 1 draft.go:915] Proposal with key: 18288822768274597105 already applied. Skipping index: 1673903. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.819607 1 draft.go:915] Proposal with key: 18288822768274597106 already applied. Skipping index: 1673909. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.839271 1 draft.go:915] Proposal with key: 18288822768274597107 already applied. Skipping index: 1673918. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.840098 1 draft.go:915] Proposal with key: 18288822768274597108 already applied. Skipping index: 1673919. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.840986 1 draft.go:915] Proposal with key: 18288822768274597109 already applied. Skipping index: 1673920. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.844175 1 draft.go:915] Proposal with key: 14419583477275073266 already applied. Skipping index: 1673924. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.844578 1 draft.go:915] Proposal with key: 14419583477275073267 already applied. Skipping index: 1673925. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.846978 1 draft.go:915] Proposal with key: 14419583477275073268 already applied. Skipping index: 1673928. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.847740 1 draft.go:915] Proposal with key: 14419583477275073269 already applied. Skipping index: 1673929. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.850774 1 draft.go:915] Proposal with key: 14419583477275073270 already applied. Skipping index: 1673932. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.878861 1 draft.go:915] Proposal with key: 18288822768274597079 already applied. Skipping index: 1673832. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.878896 1 draft.go:915] Proposal with key: 18288822768274597081 already applied. Skipping index: 1673842. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.878905 1 draft.go:915] Proposal with key: 18288822768274597083 already applied. Skipping index: 1673849. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.878917 1 draft.go:915] Proposal with key: 18288822768274597085 already applied. Skipping index: 1673853. Delta: <nil> Snapshot: <nil>.
I1224 16:41:32.884219 1 draft.go:915] Proposal with key: 14419583477275073271 already applied. Skipping index: 1673944. Delta: <nil> Snapshot: <nil>.
I1224 16:41:33.556245 1 draft.go:915] Proposal with key: 18251741697359166876 already applied. Skipping index: 1674045. Delta: <nil> Snapshot: <nil>.
I1224 16:41:33.556499 1 draft.go:915] Proposal with key: 18251741697359166877 already applied. Skipping index: 1674046. Delta: <nil> Snapshot: <nil>.
I1224 16:41:33.611549 1 draft.go:915] Proposal with key: 18251741697359166878 already applied. Skipping index: 1674099. Delta: <nil> Snapshot: <nil>.
I1224 16:41:33.611812 1 draft.go:915] Proposal with key: 18251741697359166876 already applied. Skipping index: 1674100. Delta: <nil> Snapshot: <nil>.
I1224 16:41:33.612103 1 draft.go:915] Proposal with key: 18251741697359166877 already applied. Skipping index: 1674101. Delta: <nil> Snapshot: <nil>.
I1224 16:41:33.612156 1 draft.go:915] Proposal with key: 18251741697359166878 already applied. Skipping index: 1674102. Delta: <nil> Snapshot: <nil>.
2021/12/24 16:41:33 Unable to find txn with start ts: 2287584
github.com/dgraph-io/dgraph/x.AssertTruef
/ext-go/1/src/github.com/dgraph-io/dgraph/x/error.go:107
github.com/dgraph-io/dgraph/worker.(*node).applyMutations
/ext-go/1/src/github.com/dgraph-io/dgraph/worker/draft.go:707
github.com/dgraph-io/dgraph/worker.(*node).applyCommitted
/ext-go/1/src/github.com/dgraph-io/dgraph/worker/draft.go:744
github.com/dgraph-io/dgraph/worker.(*node).processApplyCh.func1
/ext-go/1/src/github.com/dgraph-io/dgraph/worker/draft.go:931
github.com/dgraph-io/dgraph/worker.(*node).processApplyCh
/ext-go/1/src/github.com/dgraph-io/dgraph/worker/draft.go:1020
runtime.goexit
/usr/local/go/src/runtime/asm_amd64.s:1581