Tribit Stormbox Blast - sound issues after update (Patreon)

I noticed a significant change in sound after updating the Stormbox Blast to V3.1 recently, I haven't done any updates since the very beginning when I got it. 

It doesn't seem that all units are affected, but Tribit is already aware of this problem, as other users had reported this as well. Resetting the speaker etc didn't help but allegedly Tribit is already working on a fix. 

I made some measurements of the updated unit and put it side by side against the measurements I had done before the update. On top in blue you can see the default music EQ, light before the update and dark afterwards. Below in red you can see the Xbass setting. I also added a measurement done with my new EQ to get a flatter response overall, which is still far from perfect though: