Low audio volume when using Bose AE2 SoundLink Bluetooth Headphones

The volume of audio in my headphones is very low, even when it is set to maximum on the audio controls, in the app I am using (tried Spotify and YouTube videos) and on maximum when you open the volume mixer.  It is almost like there is a goveor on the sound, because (i) I do not have this issue when I use the headphones with other devices, and (ii) the green audio bar in the volume mixer will only go up to about 60% of the maximum volume even though it is set to 100%.  Frustrating.