Lost "to-read" numbers

[P.D.]

Last month, Don't Forget Steven was on 498 people's 'to read' shelves. This month... 1? What happened?

The only change that happened with Don't Forget Steven recently is that the audiobook came out. But I don't see that edition up on Goodreads, so I don't think it is anything to do with that.

Can I get my 'to reads' back?

[Paula]

Refreshed the stats, if no change in next hour you will need to report in GR Feedback group as Librarians can not do anything else

[P.D.]

Bounced back to 503. Thank you so much!