I was testing out how does it work when I put chest in between two factories. Everything worked fine, but I mention that just in case.
I was entering and leaving factory several times before that event (5-6 times) and I didn't make any special action other than leaving factory. Error occured after view jumped to new world and in less than 1 second. Probably on first factorissmo tick(?)
https://imgur.com/a/ysQvGlF

https://imgur.com/a/8OihGTk
now game crashes every time I put down/leave factory. It's 100% chance over 12 tries (8 times to place, 4 times leave)

I know it used to work well with other mods, but maybe some other mod might cause this. I'm happy to share any additional information if needed. Here's my mod list
https://pastebin.com/DFVBTB1Y

Edit: I forgot to mention - first screenshot/case is before factory overlay technology, after that technology fail chances grown to 100% - Or, perhaps something I don't notice changed in my enviroment causing this and I don't know what.

I guess game is punishing me for that I first made island world to have fun with landfill and than tryin to cheese myself out of this by placing factories ; P

It's because you have the Configurable Storage Size mod installed, which changes the storage size of the overlay controllers used for factory building overlays. Factorissimo2 is rather sensitive about that. To fix this: go into the startup settings of Configurable Storage Size, and either set the "Other containers storage size multiplier" value to at least 1, or enable the "Ignore unknown mods" setting.

Oh, ok. Thanks for quick answer. Thats make sence once I think about it. I will try that once I'm playing again.

What do you think about adding "otpional compatibility" with this mod and multiplaying storage size of overlay by 1/that_value or forcing size 4 in other way? Would it be much hastle or it wouldn't work at all?
Or you could use "filter inserters" to represent that data. I will try to dig in this topic, because I have 0 experience in modding, but it always interested me.