Here is an isolated snippet of a guitar track. It's a tele with a bigsby at the middle pickup pos. At measures 5 and 6 the ringing is the worst. In headphones, it is even more obvious. I'm presume the massive amount of reverb exacerbates the problem.
Is this reminiscent of your problem, Sharke?
I had to do some extreme eq notching to smooth it out. I tried muting the strings above the nut and below the bridge, but it didn't make much difference. Upon further experiments, I think perhaps part of the problem is the low E and A strings weren't damped, and they are probably adding to the sea of harmonic overtones. Maybe this is normal?
Here is the finished track.