This was happening in 5.0.3 and now in 5.1.1.
I only started a new project, chose the “Open world” map, and dragged 10 meshes in.
Started play, everything ok, pressed Esc and whoop all meshes gone, outliner says “unloaded”.
I tried loading the level manually but it just randomly unloads at some point, I couldnt figure when this happens and why.
Previously I tried to do an entire environment and had to transfer entire level to a new one without world partition.
Also its forced ON if chose Open World template.
Gets really annoying once you have over 100 assets, and pin is not automatically which gets bothersome and time consuming after a bit of level design.
Is 5.2 any better or am I still better off creating an empty world and copying the lights and terrain over?
( I want to use the Open World template without World Partition)
Thanks in advance
EDIT: Copying lights and export/import the heightmap into a new “Empty Level” (not openworld) does the trick apparently and looks 1:1 as the Open world template, but without world partition. I hope the bug gets fixed one day, but I dont put my hopes up with this feature to be honest 