Game switches to unsexy graphicmode

I’ve got a simillar issue, saw it first time on my last playthrough so I can’t be sure if it may be related to recent patch or just because my factory has grown quite a lot like the OP screenshot. Fortunately, saving the game and restarting the client solves the issue but unfortunately seems to happen again after a short while, hope this glitch can fe found out and fixed soon Many thanks in advance!

Will try to attach a sample screenshot, just registered to the forum and finding my way around.