Byobu output only updates through window switch
reset command seems to resolve this problem. Press F6 to get out of byobu. Then type "reset" and resumr byobu. It works fine
I found that exiting the Byobu session (F6) and running the byobu detach command before running byobu again fixes this issue.
For me, simply detaching all other sessions but yourself (Alt + F6) seem to work as well.