Flowable exception

Hello Dears ,
We are using flowable in kubernetes with ‘scale up’ and ‘scale down’ of the number of pods (( instance )) according to load :
when the load is high scale up of the pods is happen and this exception is occurred :

AsyncRunnableExecutionExceptionHandler : Job c0fffc40-aed5-11ea-b07a-ca6831c8e254 failed
org.flowable.common.engine.api.FlowableException: Error while evaluating expression: ${eligibilityCheck}
at org.flowable.common.engine.impl.el.JuelExpression.getValue(JuelExpression.java:56)

after the pod is started the spring boot jar finishing loading the beans in the container this error is disappear .
can you help me to figure out to avoid this exception and what is the reason of it ?

The eligibilityCheck is a Spring bean implementing JavaDelegate?
If so, it looks like the async executor is started before everything else is properly loaded. How are you running Flowable, which kind of configuration are you using?