In my experience, just like with LastPass, it’s a bit hit or miss at catching passwords during submissions, espeically if sites do some fancy PWA or similar.
I always proactively create login in BW first before creating account on the relevant website just to make sure it doesn’t get missed.
Yes, that happens a lot
Just make sure your prepared with a copy of the important details until they have been saved in BW.
It really is quite common for BW to fail to capture a new account. Rare for LP to so there’s definitely something missing from BW in this area but still, I much prefer BW over LP due to better security.