I hadn’t noticed this issue until just now, so I suspect its related to some recent changes (I’m at 6.14, on mac).
You will notice there is a period added in the second set of text, so maybe the Title / Description is being added to a child textEditor object?
Could be something I did, of course, but I should note that I’m not overriding the AlertWindow LookAndFeel methods or anything like that, so I’m not sure what could cause this sort of issue.
juce::AlertWindow::showMessageBoxAsync(juce::AlertWindow::WarningIcon, "Test", "Well, this is strange");
Are you overriding the Label look and feel methods? The constructor of the AlertWindow should set all of the label colours to transparent black, but if a custom look and feel were to use a custom colour instead of Label::textColourId then maybe that could cause the text to show up.