No clue what caused it. I haven't had a fill in years and there was zero fluid in the band. It had down to the bottom of my stomach and was only open 2mm. the upper GI showed a hiatial hernia as well, but when my new doc took the band off, my stomach went back into place with no hernia.
I've been struggling for about a year with limited food choices and it has gotten progressively worse to the point of only liquids and vomiting almost daily. i was relieved and also shocked when the upper GI showed so many things wrong.