I experienced this many times. In my case,I found I had a bad habit of resting my left hand on the chord and being a tad early in my chord change to suit technicord. This depended somewhat on which technicord mode I was in. I found that I couldn't be as sloppy in chord changes with technicord. Also, try lifting your left hand off the chord notes as your coming into your next chord. It worked for me,anyway.