The cursor keys / arrow keys in the Skype App in a chat doesn't work as supposed - instead of editing the text, the keys jump to other fields/buttons. How crazy is that??
Workaround is to install "Skype Lite", feels older and better for a power user, despite the "lite" ..
(unbelievable, how much Microsoft can still destroy in Skype. Every time you thought, it really couldn't get worse, they found a way ..)