I am having the same issue, I also self host. I am all up to date with extensions, server, etc. I never had this problem until a few months ago and thought it would eventually iron itself out, but is still a problem.
Some more insight, this maybe only occurring on older client devices. As an example at work I have no problem with the extension; those computers are rather up to date. The two computers I typically use at home are nearly 10-12 years old. When I go to a website the BW chrome extension does not detect the site until like 4 mins later, therefore I can no longer auto fill on sites anymore. Also if I attempt to click on the BW chrome extension nothing happens; it takes a very long time to load.
I’m wondering if everyone else here that is having a problem is also having it on these older client devices, considering it works fine at my work desktop and even laptop.