Pop up list won't stick in Windows

This relates to post 202,791.

I have set up 2 script triggers on a field. On the Mac when you enter the field script 1 is triggered which stores the current value in a $$Variable. A pop up list then appears and everything rests in that state. The user picks from the list and the 2nd script is triggered which captures the new value and does whatever.

In windows the variable is stored, the pop up list appears and then disappears and the 2nd script is triggered as though the save/exit state has occurred causing the OnObjectModify trigger to act. Same for OnObjectSave trigger or the OnObjectExit trigger.

Only happens in Windows. If I remove the triggers then the pop list shows and everything rests in that state in windows as it does on the Mac.

So is this a filemaker bug or a Windows bug?