Our UR5e picks spacer blocks squarely at the near end of the tray and crookedly at the far end. We've nudged the pickup twice. I'd like a cheap physical check before we buy new fingers.
Also compare the block's seating in the near and far pockets. A tray can sit properly on its supports and still hold a part differently. Your location pattern gives maintenance something useful to look at.
The clips use different blocks. Thanks, Hazel; I'll ask for a same-block comparison when maintenance checks the insert. We haven't got enough evidence to blame either fingers or tray yet.
There is a raised edge on the new insert near the rear locating contact. Maintenance has sent it to the toolmaker to check against the drawing. Same-block comparison hasn't happened yet.
Ask them to explain that edge before changing it. It may be an intended feature or a fault, and the drawing check should settle that more usefully than another pickup nudge.