Amex charged fee after six years

Anyone know if there’s been a policy change for Amex regarding the military fee waiver? I’m active duty, been in for nine years, have had an Amex card for six. I just got charged the fee for the first time ever. Talked to a customer service rep over the text chat and they just offered me the chance to cancel and get a refund.

I know they aren’t required to waive the fee but I’m curious if there’s been a change, or if they are signaling me out for some reason (no late payments or bad credit or any obvious reason), or if theres just a particular way to go about requesting the fee waiver.