Usually Deja takes precedence over the number here, that I assume is ElvUI. Closing and re-opening the sheet fixes this problem most of the times, but eventually comes back again:

I don't know if there's a reliable way of reproducing this. Could it be because I'm not using the black ElvUI style causing it to clash somehow?

Posting it here because I'm in the assumption that Deja is trying to replace the standard that ElvUI tries to style and something doesn't completely remove the default value.