In my python (syntax) specific settings, I have "rulers": [72, 79], and this has worked for me for as long as I can remember. But recently I only see the 79 ruler and not the 72 one.
If I specify multiple rulers in User/Preferences.sublime-settings, then I see all the specified rulers in any file other than .py.
When I switch between .py files from the sidebar the rulers briefly show but immediately disappear.
view.settings().get('rulers') outputs [79] and I can get the rulers to show again by typing view.settings().set('rulers', [72, 79]) in the console.
I am on macOS 12.1 on an Apple silicone machine with ST Build 4126.