It's the app deleting the contact lists from memory. it's VERY heavy to keep all your followers in the device.
Also, folllwer count is absolutely irrelevant in Nostr because you can just create a million keys that follow you in about a second.
Discussion
But if I'm making a bunch of keys to boost their follower count, it would be nice to know how many I have at a given moment. It's still a useful metric for personal use.
Nah, with lists and private follows that are encrypted, you will never know if the true value or if it is improving or decreasing. The metric is almost irrelevant on Nostr.
I like to see who's following and check out their accounts. Is the list gone for good? Also, if I can't tell if anyone is following my account, it's not very motivating to post.