“UM Editor” role can no longer change roles for other users

Hi there,
We are using Ultimate Member – among other things – to assign different roles to our customers so they can access the download areas on our website. So far this could be done by our staff with the roles “Administrator” and “UM Editor (um_editor)” – but now the following issue has come up:
When accessing the backend general user overview usually there is a checkbox visible for every user listed there. This is still the case for the “Administrator” role, but for staff members with the UM role “Editor (um_editor)” there is now only a checkbox visible for the first entry in the list. All other users have no checkbox and the user name is no longer a link so the user profile can be accessed. Before we updated the UM plugin in the beginning of November, those features were still available for the Editor role.
In short, the role “UM Editor” can no longer change roles for other users or access those profiles, accept for the first listed.
We are currently using the UM plugin version 2.8.9 on WordPress 6.4.5.
Any help would be greatly appreciated.
Thanks!