My FR5 is picking molded plastic sleeves crooked and the pickup positions keep acquiring little corrections; the tray looks stationary, which is not quite the same as having checked it, so I'd like to inspect the gripping and seating before awarding the arm another fault.
A fixed tray can still have moving parts in its pockets. I'd want the view before contact as well as the final grip, otherwise a correction might simply be chasing how each sleeve settles.
Maintenance observed it under our normal controlled test arrangement: sleeves were seated before contact, then one side lifted during closure; we stopped adding pickup corrections.
We had a contact insert that looked fine from above and had a lip underneath. Not saying yours has that, but the contact face and its fastening are a cheap inspection before anyone starts discussing arm accuracy.
That explains a plausible sideways shove. It doesn't tell you which of the saved pickup edits still belong there. Can you recover the last position set that wasn't adjusted around this behaviour?
We checked the recorded setup rather than blindly restoring it, and the refitted insert no longer lifts the sleeve in the observed closure sequence; the trial covered the current tray, not every tray we own.
Good, the contact fault has an observed before and after. Keep the old correction list with the maintenance record until the other trays are checked; otherwise the next shift may inherit unexplained coordinates again.