I haven't seen anything exactly like this, but it might be related to a system setting or a terminal setting (if the app is launched from a terminal) on the affected systems. You might check is whether the "Secure Keyboard Entry" setting in the Terminal is enabled on the affected macOS systems. If it is, you should see a timeout warning message when starting the application as  reported in JDK [1]. It seems possible that this setting might also cause something like you describe. If that's not the problem, then it could be some other system setting.

-- Kevin

[1] https://bugs.openjdk.org/browse/JDK-8283590

On 5/26/2023 3:06 AM, Craig Raw wrote:
I have multiple reports of application freeze (spinning beach ball) when a Dialog opened with showAndWait() is closed. The application does not recover and must be terminated with force quit. No error logging is produced.

This only occurs on a Mac, and is rare, but can be consistently reproduced on affected machines. It occurs on both Intel and M1 chipsets. Preferring a software pipeline (prism.order=sw) does not affect it. I am currently building with JavaFX 18 on JDK 18.

I cannot find any related JavaFX bug report. My own Github issue is here: https://github.com/sparrowwallet/sparrow/issues/586

Any assistance with further diagnosing or solving this would be appreciated.

Craig

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