Ah, could be that. Yes, i run my clients in "read only" mode to stop people making changes to the backend. Only solutions is to use read/write mode?
Changed the library mode to read / write (i think), but watched tags are still not persistent after a restart of MC26.
Edit: you
have to specify a username / password to actually active read/write between clients / server. Now i just have to prevent people from being able to delete / modify the contents of the library from clients.........