Change the break distance to be really large on the door and see if it still does it.
It sounds like it is auto dropping the object, you didn’t change world to meters scaling or pawn scaling or the door scaling did you?
Something has to be off about your setup, because it does it for no-one else. If it is a distance issue I can solve it, but I need to know what is causing it.
Edit NVM I found a re-production, i’ll look into fixing it, its the Justteleport flag not getting cleared if your hands are empty, manip grips by default drop on teleport.
I guess not many of us use teleportation 
or if we do, we don’t use manip grips right after, i’ll have the fix up after my 4.20 at home finishes compiling shaders and will port it back to 4.19
Re-edit Fix is live on 4.19 and 4.20, thanks for reporting, and thanks for mentioning teleporting, it brought me to the fix