Log that rect values and screens rects values before it happens, if it happens. When it happens, do a postmortem inspection looking at the last logged values for clues. Maybe some weird values has raised up.
Indeed.
Using a timer to watch a thread hasnāt been standard or recommended since the introduction of Thread.AddUserInterfaceUpdate. I donāt think thatās the problem, but I do want to make sure new Xojo users arenāt mislead.
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Sure, that is better in a lot of ways. Iāve yet to convert this major process over to it though, but I will one day. Iāve a whole state engine going on in the timer and will have to think about converting. Just not around a release time. 
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