[Vimes]

New firmware was pushed to the device yesterdays ... Did not yet have time to thoroughly test. What's your experience? Some bugs fixed?
Version: 7.2.2.9 (PS7229/1850).
Start-Page: 6242054.1

I have only found this....

As always, there is no changelog. Nevertheless, a few days ago there was already information about new functions, which should be available with this update. The Fire TV Cube can now be paired with a compatible webcam. So you can then ultimately make video calls via Fire TV Cube to other devices with Alexa and a display. To use the new function, a webcam with UVC (USB Video Class) support and a resolution of min. 720p at 30 frames per second required.

If you also own a ring video doorbell and use a Fire TV (stick), you can receive a notification on your TV when someone rings the doorbell. Image transmission of the bell is also possible. The Fire TV Cube does not currently support this feature.

Likewise, the Alexa responses should now be presented a little more discreetly and no longer disturb the TV experience. Answers, for example according to the weather, are displayed as a separate small overlay window. This feature will not be available for the first generation of Fire TV and Fire TV Stick

so if the above is all that I have noticed, and that is only from reading that, then all must be fine. Meaning that nothing further seems to have been broken, has to be a good thing..?
when viewing full screen content via the Cube we no longer get the intrusive message up on the screen informing us of a notification via Alexa, that has to be good. 

Everything else seems as normal whilst running beta 2 of Kodi Matrix.