That's really strange. I can absolutely confirm the problem in all the apps I described and a few more if I look for them.

Tk is HERE.

In case you're not familiar with Tcl/Tk, Tcl only does command-line work, while Tk does everything that Tcl does including command line + it makes GUIs, so Tcl is understandably left out. I mean, I don't think there is a "just Tcl" package.