DC14 Animal Upright beater brush bar typically stopped spinning when the vacuum was placed in the upright position (as expected). Now the beater brush no longer turns off when I stand the vacuum up to use the wand. Vacuum is also making a slight high-pitched sound for first minute or two after being powered on; not sure if any correlation but mentioning since this began maybe a month or two before I realized beater bar wasn’t stopping. I’ve taken it all apart & cleaned it well. No problem there as we have five girls with long hair & have to clean it often anyway. My best thought was the clutch, but all signs I can find online of a bad clutch point to bar *not* spinning. I have the opposite problem. Any ideas? Cannot find ANYONE with this issue online so not sure if I should go through hassle of replacing clutch or not in case it’s a different issue. What part makes the beater bar stop when the vacuum is placed in upright position?