Very minor, looking at the admin page for a user, I see June displayed as July:
Looking at /admin/email/bounced for this user shows the last bounce was 4 days ago, tooltip showing Jun 8, 2022 11:44 am.
(Aside, I was expecting to use https://github.com/discourse/discourse to find/report issues. Its README also does not mention Meta?)
I think that’s the date when the bounce score is to be reset:
not the date of the last bounced email
Ah, that may explain things. (Though I don’t know what an admin would do with that information.) And indeed it also shows a Reset button for this very example:
I think there may be a case to give that information a little more context on the page. I’ve slid this topic over to ux for consideration. 
