This happens when I read ISWAB and My First Kiss >:(
what type of phone/tablet are you reading it on ?
Yes, it’s happened to me and I filed a ticket and they said they already know about it and are working on it to fix it.
There are some people experiencing the same problem as yours on this thread:
And your best bet would be to file a ticket:
You are not the only one having this issue and hopefully it gets resolved.