Reply to Traktor 2.6.4 random mapping function glitches

2.6.4 was working perfectly for me last time I used it but upon the latest few starts, my X1 mapping doesn't function properly. Browsing the tracklist using the encoders skips every other track, setting hot cues sets some sort of flag where the cue should be but the actual numbered cue goes to a different position, etc. etc.

The only solution I have found is going back to 2.6.3 where my mapping works perfectly as it has in every version for a few years.

Any suggestions to make 2.6.4 behave normally? Thank you