B4J Question app freeze when lock user windows session

I noticed that the same thing happens in some of my applications. The program is actually running but it appears to be frozen since the form has not refreshed. When it does, I just let it sit for about a minute or move the mouse over it and the form ultimately refreshes.

But ... I sure would like to know how to prevent this from happening since one could think that the program has locked up. It probably has something to do with the JRE rather than the B4J application

I’ve seen this for some of my apps that I leave running but I’ve also seen in it other apps written in Java eg DBeaver.

So it’s not a B4J thing.

Might be an incompatibility with the display driver and JavaFX. I also see it here from time to time. Resizing the form usually solves it.

Erel said:

Might be an incompatibility with the display driver and JavaFX. I also see it here from time to time. Resizing the form usually solves it.

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Not working for me this solution.

Ive been doing some reading up on this. Looks to be a JavaFX issue. Ive downloaded a newer JavaFX so I will test that.

One suggestion (which I havent tried yet) was to change the monitors resolution. This may force a refresh. Its a not a real fix though but worth trying to see if it is the same issue.

A later version of JavaFX didnt help. Same problem.