ACT_HI_ACTINST lose some node in ACT_HI_TASKINST

I’m new to flowable. Everything is good. Recent find some bad thing, and cannot figure out why.
This is just occasionally problem,and cannot reproduction it. I found it by ACT_HI_ACTINST record msg.

It’s a simple two task node flow. But some record shows the second node is not record, though end point is recorded. Any suggestion is appreicated. thank you!

Hi,
could you reproduce the issue in jUnit test?

Regards
Martin