Send the installed job identity, active waiting step and retained confirmation state from that same occurrence. Ask the package author which physical input supplies clear confirmation for the fitted fixture.
Have maintenance check the actual sensing and signal path. The empty receiver narrows the question, but it does not identify which part of that path is wrong.
Retain that new exchange occurrence separately from the first stop and send it with the repair finding. Useful to know the repair improved one check without claiming it explained every interruption.