Basically, every now and then, without apparent cause, using Playtest function opens game window in basic resolution, completely black. My pc then starts acting up, is very slow and almost unusable, even if I manage to close both game window and MV itself.
At first I thought that some data on the map got corrupted, as it would crash on transfer from intro to a map. Restored earlier version of the map, but it didn't help. Rolling back to 1.5.2 did help, until today. It crashed again, on a different map this time. The thing is - this map worked perfectly yesterday, and I haven't changed anything since I left it yesterday. Started the program today, playtested the map to see where I left off, and had to reset my PC.
Strangely enough, testing by using index.html on firefox works with no issue whatsoever.
I tried to check if Program data is not corrupted (verify integrity on steam), but all files are correct. Now I don't know what do to with this issue - while I can test the game with FF and just avoid using playtest function, I'm afraid that this problem will persist to deployed game.
I'm attaching list of plugins used, but as I said - I wasn't making any changes in plugins between yesterday's work and today's test.