Over the years, I guess I've developed a habit of tilting the bass toward my chest so I can see the frets as I play. That made it very hard for me to use moveable anchor while I played with forearm up, because when I do that, the back of my thumb raises up, so I can't mute the E when anchoring on A. However, this problem solved that. I guess it's one of the reasons I have trouble playing standing up, because I can't tilt it towards me. Just thought I'd share this.