O.G. Mixstream Pro Pitch fader acting up

I noticed this few weeks ago with my Mixstream Pro I got used from ebay. The BPM on Deck 1 starts to wow like crazy when I tried to beatmatch with. I don’t know if this is a dirty fader or is a software/Hardware problem. Some people has problems pitch problems with other Denon players, but I could not find something related to the Mixstream Pro. Please help.

If you push the pitch slider all the way to one end of its travel, and all the way to the other end of its travel, does it fix the “issue” ?

If so, look up “soft takeover”