Optimize - Several NullPointerExceptions are thrown during the initial import

10:28:41.149 [EngineImportScheduler-1] DEBUG o.c.o.s.i.e.f.i.CompletedUserTaskInstanceFetcher - Fetched [1000] completed user task instances which ended after set timestamp with page size [1000] within [256] ms
10:28:41.151 [EngineImportScheduler-1] ERROR o.c.o.s.i.e.m.CompletedUserTaskEngineImportMediator - Was not able to import next page and reached max backoff, aborting this run.
java.lang.NullPointerException: flowNodeInstanceId is marked non-null but is null
	at org.camunda.optimize.dto.optimize.query.event.process.FlowNodeInstanceDto.<init>(FlowNodeInstanceDto.java:99)
	at org.camunda.optimize.service.importing.engine.service.CompletedUserTaskInstanceImportService.mapEngineEntityToOptimizeEntity(CompletedUserTaskInstanceImportService.java:99)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
	at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
	at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177)
	at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
	at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578)
	at org.camunda.optimize.service.importing.engine.service.CompletedUserTaskInstanceImportService.mapEngineEntitiesToOptimizeEntities(CompletedUserTaskInstanceImportService.java:78)
	at org.camunda.optimize.service.importing.engine.service.CompletedUserTaskInstanceImportService.executeImport(CompletedUserTaskInstanceImportService.java:50)
	at org.camunda.optimize.service.importing.TimestampBasedImportMediator.importNextEnginePageTimestampBased(TimestampBasedImportMediator.java:57)
	at org.camunda.optimize.service.importing.TimestampBasedImportMediator.importNextPage(TimestampBasedImportMediator.java:38)
	at org.camunda.optimize.service.importing.BackoffImportMediator.importNextPageRetryOnError(BackoffImportMediator.java:98)
	at org.camunda.optimize.service.importing.BackoffImportMediator.runImport(BackoffImportMediator.java:46)
	at org.camunda.optimize.service.importing.AbstractImportScheduler.lambda$executeImportRound$2(AbstractImportScheduler.java:99)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
	at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:550)
	at java.base/java.util.stream.AbstractPipeline.evaluateToArrayNode(AbstractPipeline.java:260)
	at java.base/java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:517)
	at org.camunda.optimize.service.importing.AbstractImportScheduler.executeImportRound(AbstractImportScheduler.java:108)
	at org.camunda.optimize.service.importing.engine.EngineImportScheduler.runImportRound(EngineImportScheduler.java:57)
	at org.camunda.optimize.service.importing.AbstractImportScheduler.runImportRound(AbstractImportScheduler.java:65)
	at org.camunda.optimize.service.importing.AbstractImportScheduler.run(AbstractImportScheduler.java:35)
	at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54)
	at org.springframework.scheduling.concurrent.ReschedulingRunnable.run(ReschedulingRunnable.java:95)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.lang.Thread.run(Thread.java:834)