This is for anyone having a crash with Maraxsis 1.30.50 ~1.30.53 and Quality Assurance 1.4.1.

I have confirmed rolling Quality Assurance back to 1.4.0 works while rolling back Maraxsis does not.

I have already said that it isn't directly caused by Quality Assurance due to the nature of the issue.

Disabling the AMS Assembly Machines in the mod config also fixes this. So if you can live without the extra slots for machines you can have the latest QA.

@Brave: Regardless something about QA's latest version is not playing nice with Maraxsis, so this thread is to help others encountering such an issue.

Sadly, I use a lot of machines with the extra slots so I'll be staying on QA 1.4.0 until one or both mods update with a fix

Apparently it's a factorio engine issue caused by... well I'm not sure, the devs weren't specific.
https://forums.factorio.com/viewtopic.php?p=680450#p680450
They're fixing it in the next factorio version.