So… I finally tracked down the issue. I managed to connect to my PC remotely and found out that the problem was actually in the new engine I used for the latest build.

Yeah… turns out bugs don’t happen only in games — sometimes they live inside the engines themselves.
I’ve rebuilt the release using an older, time-tested engine, and now everything should work properly.
Sorry for the trouble — I really thought the new engine would handle it fine, but well… lesson learned.
Thanks for your patience and for letting me know about the crashes.