SCALE Samba group write permissions do not work

I am trying to allow a group of users to edit the same dataset items.

I added a standard SMB share on a new empty dataset (smb1.PNG)

I then added ACLs to allow the user group `smb_users` to write to that folder (smb2.PNG)

I added a folder "test folder" with a single file "empty_file.txt" as user "chris" who is part of "smb_users" group (smb3.PNG)

I then tried to edit the filename using the user "machines" who is also part of the "smb_users" group, and it errors (smb4.PNG)