Dear Maintainer,

when having multiple subwindows, and putting them in a group and using
Broadcast to group, or when using Broadcast to all, the characters typed
in one subwindow will be copied TWICE to other subwindows, instead of
just once. This makes the Broadcast feature unusable.

It did work few years ago for me fine, but now it does not for quite a
bit of time.

Regards,
Witold