Here is a few examples of my specific issues, i am assuming this is happening a lot since recent updates so to help troubleshoot (for both us and plex lol) and in hopes i can successfully recreate the issue on demand, so we can find a process / pattern that can fix this on our servers.
Home User Error Pics
Pic 01 shows the WebTools-NG info for the users who DO NOT SHOW UP on my Home users list, cannot use plex pass, etc, all users experiencing same issues, only HOME users also, they were prior HOME users on my old server also
The webtools shows that the users ARE NOT a part of the home users list

Pic 02 to confirm that my 1 user was i was able to get to show up, many many hours of adding, deleting, removing friend, and readding to my server in every single combination later, nothing solidly worked, just happened to appear in the home users group finally lol so not able to recreate, have tried 3 times now with others, none could be added to home users

Pic 03 shows one of my users (an uncle who lives with me and i have permission to share his user id for this project) whos account showed NOT on HOME users group, also shows the ADD TO HOME USERS group quick link in their profile on my server…
Pic 04 here is that 1 user i got back onto home users group, confirming what WebTools shows me that they ASE IN FACT in the home users list, and the quick link to put them into the home users IS NOT THERE, working for this 1 user account, all others have home symbol
Pic 05 ok, the actual error message now, every single user ive tried except ecto up there, lucky guy lol, i receive this error message user is already part of your home, yet they are not, and confirmed in multiple ways they are not, and all of them cannot use plex pass benefits from home group for more confirmation they are NOT in Home group
hopefully this helps speed things along for us
EDIT: i should specify, as per this forum threads original post, none of the users except ecto and myself, the admin account, appear in the Home users list on my server settings, but 1 strange thing for my users, they could all see the other 10+ accounts the very firs time they tried to log in, and then i had them sign out, they could only see themselves, thus not other home users, ecto can see me i can see him