Folks. I have a 3 year old Symmons S-4700-TRM in my shower. Entire bathroom was gutted and installed at that time. The handle on my Symmons that turns the shower water on and adjusts the water temp used to be “shut off” when it was in the 3 o’clock position. The other day I felt a funny feeling when I turned the shower on and then when I shut it off after showering the shut off handle closed off in the 2 o’clock position. Yesterday after showering it shut off in the 12 o’clock position. The turn off position is shifting for some reason. I also have to really tighten it shut in order for it not to drip. This is new. It worked fine up until a couple days ago. I’ll call a plumber for sure but I wanted to make one attempt to understand and possibly fix this my self. Any thoughts or ideas will be most appreciated.