Not sure if it concerns Active State: on Linux Mint 20.1 Cinnamon 4.8.6, Linux Kernel 5.4.0-73-generic, 64 Bit, I found this bug:
Installed Tcl/Tk 8.6.10 using mintinstall, tried to invoke my current project Vectorleaf 0.1, but no reaction on mouse action.
Digging deeper I found that vitual events do not fire on canvas widget.
If I input:
% bind .c <ButtonRelease> “puts released!”
Then on Button press and release “released” appears on console.
If I try this virtual event:
% bind .c <ButtonRelease> “”
% event add <<Click>> <1><ButtonRelease>
% bind .c <<Click>> “puts clicked!”
Then nothing happens on mouse click.
My workaround: removed 8.6.10, installed 8.6.9, and I am happy because my project procedes, but possibly you are not.