Hi when i restart editor or build game my child bp have a problem!!! vehicle body(skeletal mesh) disappear (picture 1) and if i set manually mesh and animation BP(picture 2) all work fine(picture 3) to next editor restart or game build, any idea?

Hi ,
Thanks for report! This appears to be same issue reported here:
I have added your information to bug report (UE-18765), and I’ll let you know when I see any update.
just for information, I try 4.9 preview and it don’t fix problem!!! maybe in final release?
Hi ,
issue hasn’t been identified and fixed internally yet, so I can’t put a timeline on when it will make it to a release. I am working to find a reliable repro test case, but without it this may take some time. I would advise making a new parent Blueprint and new children from that, for now.
if you want, i can give you my project for research?
That may be helpful. Can you upload it somewhere and send me a link via PM on forums?
in 4.9p4 same problems, i start worry about 4.9 final??l!!!
We don’t have anything specific placed in 4.9 that would address this issue. You can, however, take a look at suggested github commit recommended in ] and see if it helps.
in 4.9.1 all work without “temp fix”, so i thing problem was fixed