Mine does weird things like this sometimes. Since the update, if there is a track that I have on Solo, I have to click and unclick in order to hear audio.
Also, sometimes I disable my video card (it’s a blackmagic card) and turn it back on.
Dell Precision 5810 Intel Xeon 3.0 GHz
NVIDIA Quadro M4000
Adobe Premiere Pro CC
After Effects CC
Cinema 4d r14