Saw some mentions of this on twitter today also. I cannot reproduce this at all however, so either it is a bug, or it is an AB test.
If this is intentional, this is not acceptable for reasons I shouldn’t have to explain; e.g. some UGC is designed to be modular, and cool accessory combinations are impossible if this is intended. There is no benefit to enforcing this, it is completely arbitrary and prevents an unfathomable amount of player expression. Enforce the number of accessories instead, like currently. Hoping this is just a bug.