Collision & trace are not responding during a game

[Osmose_ben]

Hello everyone,

We are stuck with a problem:

We are working on an RTS/RPG Game and during our games, we encounter a weird bug:

Collisions & traces are working at the beginning of a game, but after sometimes, they are not responding anymore (we can pass through buildings with collisions, linetraces & spheretrace are not responding anymore…). This bug seems to affect only an area of our map, not the entire map (the area is also random). With our research, we suppose that the bug is created with a large number of linetrace?
Is it possible?
Any idea about how to solve this bug? Is there a sort of “cache”?

Thanks for your answer!

[Osmose_ben]

Hello,

We have more informations about this bug:

-Collisions seems to disappear only on serverside (but also during a solo game) client side has collision
-Appear only on a specific area
-The bug affect only blueprints

Here is a little video (clientside) with show collision ON, collision seems to be here…

Here is my stat game (on serverside):

Anyone with an idea please?