There seems to be a failed or missing repaint of that text label on the second time.
(Which is the first time you've done a selection on the Option Menu.)
I wonder if this is a bug in the TK code itself? When liverpole and I deleted some items from the OptionMenu the bug also went away. But when we forced a repaint (covering the window, moving it) as you said, the system works as expected.
In reply to Re: tk label text disappears ?!
by wulvrine
in thread tk label text disappears ?!
by lepetitalbert
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