Return them and wait. Seriously.
I've had my AirPods Pro replaced under the service program once already, and with the "clicking" sound returning while on calls, they sound like they're due again. I've talked to other people who have already gone through four replacements. Since AirPods are notorious for not being "repairable," I don't think they are using refurb hardware replacements, but simply have never figured out how to permanently fix this design.
Given the unsolved ANC degradation problems, I'd never advise anyone to buy this generation of AirPods Pro at this point. I'd wait for and proceed cautiously to AirPods Pro 2 instead.