Visibility State Problem in KWGT

I am new to this app so I apologize in advance for being a newbie. But this seems quite strange to me...

I have added an Overlap Group to my widget. I want to control its visibility based on a Tasker variable. I got that all basically setup. But I have discovered that it only works if the result of my formula is in all lower-case. And I find this very strange as (a) in the editor it always shows with an upper-case first letter, (b) in the help in the formula editor it shows that the value to be returned is all upper-case, and (c) in examples seen here I have seen both all upper-case and upper-case first letter used in solutions.

So is this a bug? What are the rules for computing and returning these sorts of values (visibility, icon names, etc) from formulas?