AE2 SoundLink sidetone plays constantly, even when not in a call
I'm using a set of Bose AE2 SoundLink around-ear headphones on a 2017 macbook pro running High Sierra 10.13.6 (17G8030).
Sometimes, the headset will just get locked in sidetone mode even though I'm not on a call or using the mic. The audio quality of my music drops through the floor and I suddenly start hearing every background noise in the room which, needless to say, is really annoying.
Does anyone have any idea why this happens or how to easily turn the sidetone off when not using the mic?