Hi Virusik,
I’m not certain I understand what’s happening here. You have a level that has some volumes in it that stream sub-levels, right? When you say your bots are falling under map, that seems like a collision problem. When does that start happening? Is it only once a new sub-level is loaded? Please be descriptive of when and where exactly that starts happening (on begin play? on sub-level load? in persistent level or only sub-level?) and how your level is set up (is sub-level loaded on begin play, or only when volume is entered?). Thanks!