Yeah I’ve done that as well without issues (I have a smaller case that uses the same old Meanwell brick that is known to cause problems with grounding, but it’s all packed up atm).
No idea why sometimes you get all sorts of problems and sometimes not. I guess it’s the nature of such a complex system. Is it a specific module? Is it the busboards? Is it the lack of grounding? Once you have a problem it’s really hard to figure out where it comes from, at least for me.
