I have the same problem more than 3000 people are having on Instagram....Yep it's about my followers depleting. I get 10 then they go away. this keeps happing I doubt Im getting that many unfollows
Our engineers are currently looking into an issue that causes for the follow counts to not update properly. The issue turned out to me much more complex than initially thought, hence it is taken longer then expected.
There are other aspects around followers to be aware of, though, which we're explaining here.