It seems they've found a particular bug in NT where sometimes a wrong parameter value was input (By the software itself somehow, I assume; maybe by whatever AI processes it has?) and was causing issues. Wat specifically says that this impacted sound quality. They're going to make a temporary update tomorrow that will fix the issue. (I assume this will be rolled into the product as a whole, of course; "temporary update" is probably more like "patch" in this case.)
Wat says they are sorry for the inconvenience and thank us for our cooperation.