Urxvt tabbed(ex) scroll doesn't work when mouse is not inside urxvt window

[Vas No Medas]

Hello!

I've stumbled upon a little problem with using this patched urxvt.
After installing urxvt-perls and using url-select plugin from there I've
seen the following behaviour: I press Alt+U to enter url selecting mode and
after that the terminal ignores any input (tried Esc, different
combinations, but no luck, it was just frozen). The same with tabbedex
extension when I try to rename tab.
For example in tabbedex the problem starts when sub tab_key_press returns 1
instead of ()
After that the $keysym:
>sub tab_key_press {
>   my ($self, $tab, $event, $keysym, $str) = @_;
the $keysym is always empty after tab_key_press returns 1 instead of ()

Maybe you've got ideas why this could happen?
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