Triggers and Item placers disappearing

What Type of Bug are you experiencing?

After 29.1 patch, when I try to edit for updating my game, some elements disappear randomly. It happened with all my triggers and sometimes with the item placers. In the last 29.00 it happened with the “ledge device”, not now. Maybe is a similar problem?

Steps to Reproduce

No idea about the triggers. It happens randomly, I didn’t change related devices or structures near them. I have noticed the placers disappear when I return from testing in Creative.

Expected Result

Not disappear things while editing map.

Platform(s)

PC (UEFN + Creative)

Island Code

0898-4905-4346

Thanks and I hope this is fixed soon, it is quite scary and annoying.