Maybe try the ASIO driver meant for the mixer (?)
https://www.behringer.com/downloads.html

Why do you need ASIO4All?
Your device *should* have its own drivers meant to work for that particular device.
You should use that if you can.

That said, the mentioned distortion can be many things .. including bitrate mismatch.
How are you monitoring? (how are the speakers/headphones you hear distortion in physically connected?)

Could a Windows update cause this? I would say yes, but most likely from changing a setting somewhere, like the Windows Audio area (little speaker icon).

Make your sound your own!
.. I do not work here, but the benefits are still awesome