can you replicate setup shown at
this is some heavy usage of effects and tracks so may be bug only surfaced under those conditions.
Unfortunately, I am not very good at actually running complicated things in Cinelerra, however I think I set up similar options but not sure I got everything done correctly and my replication attempt after some time was unsuccessful. I bet that IgorBeg can though as he is quite clever in getting CinGG to do complicated setups.
The attached does show what I was capable of though! ; )