If every damn thing in a shielded room is not bonded chasing EMI is like chasing a ghost.
Used to drive me nuts building wide band receivers when high powered amps would go into oscillation and I would solder the can to the copper clad.
Problem solved until some dumbpass engineer tells me I can’t do that, we need to use a conductive epoxy, like Chobond.
I soldered that shit down and covered it in Chobond lol
There, now it works and yer none the wiser. Lo not per print, but it works.