Ref: back to Reddit pic in post 199, the floor fitting looks substantial enough to prevent the plug from lifting sufficiently to disengage the roller to cam track, unless the grey fitting is an open claw and not an eye, I do concede the top guide rollers seem a little thin, I am guessing a mere 5mm engagement with the track bracket.
I am sum-what surprised, after having years of dealings with a pedantic QA department, that some have not pointed out that production failings are not their remit, and so on behalf of them, please refer to Quality Control in issues of production or maintenance failings
