I'm having the same issue, twice now, and seems intermittent.
I have a root folder with hundreds of nested sub folders containing thousands of videos I want to upload to Google Photos in one HomeVids album
I don't want an album per subfolder so I have a program that iterates through the all the subfolders - those that are leaves of the tree structure - and invokes rclone each time to copy all the videos in the subfolder to HomeVids
rclone copy sourcefolder remote:album/HomeVids
This worked well for a while and then it suddenly started creating a new HomeVids albums for each video.
I noticed this early enough - around 50 Albums - so was able to interrupt the program, clean up and start again. I kept the original HomeVids album with 149 videos.
When I listed all the albums I see them all with the same name HomeVids followed by some UUID like this:
rclone lsd remote:album
...
... 149 HomeVids {Azase ...... OPJ73sn} <== This is my intended target
... 1 HomeVids {Azkdsjlk.......Okdsnmj}
... 1 HomeVids {AkQWEk......JIOUJDKJLK}
...
(truncated for brevity)
So I tried again using the name and UUID as follows to ensure all new vids were uploaded into the one HomeVids album I want - the one with 149 items.
rclone copy sourcefolder remote:album/"HomeVids {Azase ...... OPJ73sn}"
This worked well... all videos were uploaded and added to album HomeVids, until it didn't anymore.
This time it has created a second HomeVids album where the actual name in text is :
HomeVids {Azase ...... OPJ73sn}
and all videos are currently being added to this second one.
I have around 700 in the first one and currently 200 in the second.
I do not have the logs as the process is still running and I don't want to interrupt again at the moment, But if I have to start again I will use the -vv flag, hoping rclone appends when run multiple times.
Note. the album I am trying to group everything under is shared.
Could it be a session/timing thing...that a new authorisation/session is required and "context" gets lost?
It's like the UUIDs are no longer valid :
If I now list all albums I don't see my target album listed with the UUID as above:
...
... 749 HomeVids <==This is my intended target - no UUID!
... 200 HomeVids {Azase ...... OPJ73sn} <== this is the second album currently populating - with the UUID I targeted, but as text in the actual name as displayed in Google Photos.
Hope this is clear.