Vanishing Album V9.0.0

I have just upgraded to Version 9.0.0 on my Windows 10 22H2, 64 machine, 
and I am having a problem with one of my main Albums.

The album in question is a networked folder S:  and has 53k plus images 
and videos in it, in 566 subfolders.

When Digikam first starts the Album is in the list of Albums. It then 
vanishes from the list and I note that it has started to scan all the 
sub folders of Album Root: S: as a process. When it has finished this, 
which unsurprisingly takes a lot of time, the album does not re-appear 
in the Album list.

If I look at the Root Album Folders it is ticked and under collection of 
Network Shares
Monitor the album for external changes is NOT ticked.

If I close Digikam and restart it then the album is now present in the 
album list, and I can see all the images. However if I add a tag to an 
image in the library it goes of into the scanning activity, and the 
album vanishes again

What have I got wrong?