Versa 2 active zone minutes more than total activity time

[Onyxwar]

 

I use a Fitbit Versa 2. The following issue has happened three times now. 
I went on my usual short walk this morning to get the dog out before we left for a few hours. The total recorded walk time was 35.22 mins, which is correct. My “Fat Burn” zone says 21 mins and 2hrs 39mins below zone. I did pause it, tapped the flag and forgot about it for 15 mins or so before I tapped “end”. Even if it was counting my HR zone while paused, which it shouldn’t be, the time doesn’t add up. 
Has anyone else seen this? It doesn’t really mess anything up unless the “zone mins” were showing “fat burn” or “cardio” for longer than the activity time, but it’s still annoying. 
I restarted my Fitbit, uninstalled and reinstalled the app when I first noticed this but that didn’t make a difference. 

Moderator edit: subject for clarity 

[JohnnyRow]

Sorry I don't understand.  You say your zone minutes were more than total activity time.  You had 21 zone minutes.  What is the total activity time you are saying is less than 21 minutes?

[MarkMM]

@JohnnyRow I think the confusion is 2.5 hours below zone. Does seem odd. Unless it was forgotten in pause mode?