Adjuster won’t pay for diagnostic, is this normal

Filed a claim for a collision, adjuster paid for all repairs as expected. Got the vehicle back, body work looks great, but parking sensors still show fault.

Body shop says the scan tool shows fault with rear sensors, and since the collision happened to the front, the adjuster won’t pay for a diag even though sensors worked fine before accident and nothing else has happened.

My agent is going to try to escalate the issue, anything else I can do? Is this standard practice?