[Defender] Defender: Error with Security Keys Feature

Defender reminded me that my Security Keys were old and should be regenerated. No problem I thought. But once done, the alert didn't go away.
It now still marks Security Keys as an outstanding issue, despite it itself says: "Your current security keys are 0 days old. Time to update them!"
I tried regenerating them a second time, but it still remains. Any thoughts on how to resolve this? I generate monthly reports on this site, and don't want the client thinking there are outstanding security issues.
There is the Ignore option - but I don't know if that means it will ignore it this time, or forever. I need it to still remind me when these keys really are out of date.
Many thanks,