I have set a user on our GLD80 with very restricted permissions but have given them access to the Gain/Pan/Custom 1/Custom 2 rotary. When that user logs in, the Gain rotary is not available, although Pan, Custom 1 and Custom 2 all work OK. Any suggestions - feels like a bug to me!
I wonder if you also need to enable the gain etc. In the channel. There are a number of things like that where you need two things enabled for them to work as you expect. Just guessing, since I can’t try it in the editor, which doesn’t do user stuff, and the GLD is in the church.