I guess I should give a more detailed explanation:
Kuras asked me to look what could cause his modified Rexxar campaign to crash the game whenever he transitioned between submaps (for example, from act 1 (orcx01) to the Orgrimmar Tunnels (orcx01_2).
I've checked - triggers seemed to be modified to work with custom campaigns properly.
On my device everything worked as it is supposed to work - transitions worked properly, and game did not crash.
We decided to make a campaign file from scratch in parallel - we extracted orcx01 and orcx01_2 through the WE on current version (2.0.3), and made the same changes, and compared how the files work.
Results:
Kuras's device - his file crashes the game, my file does not crash the game.
My device - both files do not crash the game.
The issue only happens on submap transitions - going to orcx02 works fine.
We noticed that files have different sizes. While campaign info is slightly different, the only changes to the orcx01 map are supposed to be in renaming the cache and changing links to maps in Init Zones, so why my file is smaller is unknown to us.
We both believe each other when we say that we did the same actions, but would like a thought from people who can check if there is some difference that we are missing or something that one of us did and the other did not.