DDJ-REV5 the crossfader appears to be not functioning properly

[Slak_Jaw]

From a new related topic:

Crossfader choppy in macOS (DDJ-REV5)

I just used both of those MIDI Monitor tools. Both times, as I slowly move the crossfader, the data slows down and gets choppy towards the middle. Very similar to what I see in Djay Pro. So, does that pretty definitively make it a hardware issue?

Conclusion is a hardware or firmware related issue.