I have noticed a few different people are having the same issue as me and a friend.
The Volume Slider will still be at the designated position, but the actual volume when switching videos is reverted to Full Volume.
The slider does not move even though the volume is increased, and when moved manually adjusts the volume accordingly.
Is there any fix for this? It is random when it happens. Sometimes 8-10 Videos in a row. Other times not at all.