Scheduler: BackendInvalidInputException: not at top of queue

[david-allison]

https://ankidroid.org/acra/app/1/bug/252754/report/bfee7d84-b645-4e6f-99ff-8f21822c9c4e

net.ankiweb.rsdroid.exceptions.BackendInvalidInputException: not at top of queue
	at net.ankiweb.rsdroid.exceptions.BackendInvalidInputException.<init>(BackendInvalidInputException.kt:28)
	at net.ankiweb.rsdroid.exceptions.BackendInvalidInputException$Companion.fromInvalidInputError(BackendInvalidInputException.kt:37)
	at net.ankiweb.rsdroid.BackendException$Companion.fromError(BackendException.kt:114)
	at net.ankiweb.rsdroid.BackendKt.unpackResult(Backend.kt:281)
	at net.ankiweb.rsdroid.BackendKt.access$unpackResult(Backend.kt:1)
	at net.ankiweb.rsdroid.Backend.runMethodRaw$lambda$1(Backend.kt:118)
	at net.ankiweb.rsdroid.Backend.withBackend(Backend.kt:131)
	at net.ankiweb.rsdroid.Backend.runMethodRaw(Backend.kt:117)
	at anki.backend.GeneratedBackend.answerCardRaw(GeneratedBackend.kt:698)
	at anki.backend.GeneratedBackend.answerCard(GeneratedBackend.kt:703)
	at com.ichi2.libanki.sched.Scheduler.answerCard(Scheduler.kt:136)
	at com.ichi2.anki.Reviewer.answerCardInner$lambda$10(Reviewer.kt:1072)
	at com.ichi2.libanki.ChangeManagerKt.undoableOp$lambda$0(ChangeManager.kt:136)
	at com.ichi2.anki.CollectionManager.withCol$lambda$1(CollectionManager.kt:119)
	at com.ichi2.anki.CollectionManager$withQueue$3.invokeSuspend(CollectionManager.kt:103)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:104)
	at kotlinx.coroutines.internal.LimitedDispatcher$Worker.run(LimitedDispatcher.java:111)
	at kotlinx.coroutines.scheduling.TaskImpl.run(Tasks.kt:99)
	at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:584)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:811)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:715)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:702)

[david-allison]

Seen this before. Not new