Attached BP actors are being unattached after compiling

Hello there,

as described in the title, I have experienced some sort of bug with one of my BP actors. I have attached it to another instance of this BP. Everytime I compile the BP, any attached instances of it are being unattached in the editor and I have to reattach them.

Repro steps:

  1. Create any actor BP
  2. Drag the BP in a level twice
  3. Attach one of the BPs to the other
  4. Make a small change in the BP and compile it

I tried to reproduce this error in a clean project and got the same result. I wasn’t sure if this is actually a bug, but I haven’t found any threads about this problem and it is really annoying, because I always have to reattach them.

Have a great day

Hello,

I have been able to reproduce your issue, and have entered a bug report, UE-33278. Thank you for your report.

Have a great day

Hi, I still found it appear in 4.22.3, but not every time. I’m only editing the BP but sometime found the map is also edited, Then I found my BP attached to it was unattached. Haven’t found the guaranteed way to reproduce though…