Hi There.
Good News and Bad News.
Good News is that it is not your wego3 or Audiobus (99% sure). the bad news is that it is Djay2!!!
My wego2,audiobus & djay were working great for over a year until I did the last upgrade to Djay2 a few weeks ago and Viola, the headset stopped working on the wego.
I too upgraded and downgraded audiobus and it made no difference. I'm going to find the older version of Djay and downgrade it back to how it was before the issue.
Djay works fine without audiobus but we are both using it for a reason so it needs to get sorted out.
I will let you know that the djay downgrade solves the problem until Djay or anyone else solves the software issue.