It looks like I’ve made a mistake in Follower Checker 2.3 that causes it to “skip” pages in Mutual Follow Check mode. It’s been fixed now.

Again, you should automatically get the new update in a few hours.
If you don’t want to wait:

1. Click on the X icon
2. Click on Manage Extensions
3. Select Follower Checker 2 and click on “Re-install / Manually Update”
4. Refresh the tab.

Sorry about the inconvenience, and don’t hesitate to send me an ask if it still doesn’t work. Thanks for using XKit!