[Tkinter] Tkinter GUI works on Windows but not on Ubuntu

[danbei]

I didn't see where you used multiple lisbox selection. On my end it apppears that that's the source of the bug, more precisely the <<ListboxSelect>> binding event.
I don't know what's behind it, it's quite opaque for me.
Nevertheless using <ButtonRelease-1> with a few other binding event as <Keyrelease-Up>/<Keyrelease-Down> should do the trick.