SSH - byobu - problems with changing windows

Hello,
I reinstalled OS and RDM and now some byobu key bindings are not working. I can achieve this in Putty or MobaXTerm or PowerShell SSH. I have exported and imported RDM config.

I'm connecting to X machine with SSH and then running byobu (terminal multiplexer). byobu supports many windows and since reinstall I cannot change/cycle trough them. This is from byobu help:
Alt-Left/Right Move focus among windows
Alt-Up/Down Move focus among sessions
When I try to change sessions it is recognized and I get message that there are no more sessions, which is correct. But when I try to change window, I get no message and nothing happens. When using Putty or Moba or PS I would get message that there are no more windows (or if there are any, it would change window).

Example of byobu session message in the left, bottom corner.


I have already tried disabling all RDM keybindings. It is weird to me that Alt+Up/Down works but Alt+Left/Right does not.

Hopefully I'm doing something wrong and this wasn't "disabled" by some newer version of RDM :)
Kristjan

p.s.: I love it that I can paste pictures in here!