No, I have not set the Dock to automatically hide.
my dock here is hiding as usual
Does that mean it’s displayed at all? If so, it might at least partially be doing what I’m describing above. Have you tried using the CMD+TAB shortcut to switch between spaces?
This would indicate a bug in Catalina actually maybe?
If it’s Renoise that’s relying on non-standard behavior, then I wouldn’t say so, even if it isn’t an issue in Mojave. I have not run into this with any other apps, let alone ones with conventional full screen modes.
As far as I recall, this was also an issue when I ran Mojave. Maybe you can share your system details?