The "Always Show" visibility rule is not working as expected. I selected "Always Show" for the Comments field and clicked Save. On the form it says Visibility Rules - Disabled (It should say Enabled). When I click to re-enable it takes me back to the original setting. Here are the two screenshots.
After hitting Save when I come back to visibility rules, this is what I see
That's weird. Try remove the field and put it back.
It it does not work, log a support ticket.
It's because "Always Show" is logically equivalent to "Visibility Rules = Disabled"
Always show is an option so that if you have setup conditional rules to show or hide, then you can disable those to return it to the default state of "Visibility Rules = Disabled"