Hey there Mates!
I switched from xfce to MATE about 2 months ago and really like it. However, the menubar option to keep a window on visible workspace stops working randomly on different windows.
For example, with Thunderbird, I will right-click on the titlebar, select "Always on Visible Workspace" and the option will function as expected for an undetermined amount of time (few hours, few days). Once it's selected, I can scroll through my workspaces and the window sticks. Eventually, I will switch workspaces and it won't be there. I have to go to the workspace it is at and re-select "Always on Visible Workspace."
I can't seem to find folks with the same issue and i've never had sticky windows ever be an issue. It wouldn't be a huge deal if it only happened with 1 application, but it happens to any application eventually.
Im not sure if I just have some corruption somewhere or if something else is going on. I've never had an issue like this before.