Your B2 is reasonably up to data and your wifi signal is good, so I don't see any potential problem there.
You should be able to rename artists, albums and tracks without any problem. I don't use the WebUI for uploading as I use NAS instead. However, I have just run 'Bulk Upload' as a test for this situation. The artist is 'Nanci Griffith' and the album is 'The Best of Nanci Griffith'
I am running on 'B2B Aug 02 2021' software.
I got the following message just as the upload started, but the upload did run.
"Folders hidden by browser for security reasons - music uploaded to Artist/Album Unknown". I don't know at this time what the reason for this is.
I looked into the artist folder 'Unknown' using the WebUI and sure enough the album was there and it was correctly named 'The Best of Nanci Griffith'.
I used the WebUI to rename the artist from 'Unknown' to 'Nanci Griffith'.
The album then showed up in the WebUI in the already existing 'Nanci Griffith' artist folder.
I played some of the tracks and those are good.
So my WebUI upload and rename worked as expected.
At the moment I can only suggest that you run a 'Web Upgrade' to get to the latest version. For the 'B2' version that you are running, I believe that will be 'B2 July 13 2021'.
Regards,
Peter.