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macOS 11 Big Sur - Setting FP.Closeable = False while FP.State == Closed gets the Close Window button stuck in the disabled state

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I found a bug that seems to impact LabVIEW 2019 and 2020 on Big Sur (macOS 11) -- there's no problem on Mojave (macOS 10.4), from what I can tell.

 

Please see the attached VI for a demo of the bug.

 

Note: to even get LabVIEW running on Big Sur, you'll need to apply the solution/fix in this thread: macOS Big Sur: Labview crashes on launch

 

The issue is that setting FP.Closeable = False while FP.State == Closed gets the Close Window button stuck in the disabled state.

 

2020-12-04_13-58-18.png

 

This affects the VI even when it's idle

 

2020-12-04_13-56-10.png

 

The fix is to set set FP.Closeable = True while FP.State == Closed.

 

2020-12-04_13-59-39.png

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Solution
Accepted by topic author Jim_Kring

Filed with NI as Bug 1200458

 

Here's a VI (attached) that will get a FP "unstuck"

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