There have been recent reports of such a bug resurfacing again in version 2025.12.0 for some users. Comments about this issue made on other threads have been moved into this topic, to consolidate the discussion and collect evidence in one location.
This might just be a corrupted data file on your PC. The solution to that is uninstalling the extension, removing the local data storage and reinstalling.
For me, the problem with this bug is not that the number of matching logins is not shown in the icon badge, the problem is (as it was with the previous bug) that the keyboard shortcut to autofill does nothing at all until I autofill with the mouse (clicking on the icon badge and then on that beloved tiny “Fill” button in the item list).
I am used to using the keyboard shortcut mainly, so having to fumble with my mouse to continue working is a bit irritating for me.