On a XP system PC, I found sometimes when click combobox of javaFX, there is no response.
I can't see the content of the listed combobox records, but in fact the records exist.
If you click on the location(imagine there is a listed record), you can select the record.
I mean the listed records are "invisible" sometimes. But you can "click and select" them.
Still the problem happens on Tips. I can't see the tips sometimes.