they started fitting the o'ring mod at the factory. just take a pot off (carefully) if there's o'rings underneath then its fitted.
the rings are assembled with some dry lube to keep things moving, potentially none was installed of yours?
if you take the knobs off are the pots themselves still tight? if yes there is a problem with the pot.
*as an aside, are you in one of my 3D printed housings? if yes, PM me and i'll offer you some advice in what could be the cause.