Thank you Scott for sharing your Bb Blues Solo Etude. Good job! It is so clear on those phrases.
1st phrase, your fingerings are great! But your thumb is not following your phrase at all. Plesae watch my suggestion video deeply so you can learn how to move your thumb position as you go up that phrase and you can focus on your right hand palm muting. You moved finally at 0:23.
F7, Eb7 phrases... you need to lower your thumb position. Your first joint of your thumb is around 5th string (behind the neck) You can watch my demo video and please check my thumb position.
So for fixing muting issue, you can only focus on 1st time around so you can go deeper on each phrase. (Up till 0:48)
Overall your phrasing is so good!
Tomo