Thanks to the lockdown, I've had the chance to do a lot more practice of late, and I've noticed over the last couple of days that when LH muting a note after playing it, I'm getting very strong harmonics coming through, to the point that it's almost as strong as the fundamental note. Obviously it's worst on the 5th fret, but it's also noticeable to a lesser extent on the 3rd, 7th etc. It's even when I'm deliberately trying to LH mute, not fret a harmonic. Moving the LH away from the fret helps a little, but not masses.
Now, it could just be I've got crap technique and I'm only noticing now because I'm practicing more through headphones. However, I've never really noticed it before and I've had crap technique and been playing through phones for a while... Practice setup has changed - now going into a MS60B into headphones, whereas before it was a Flyrig into headphones. Phones themselves haven't changed though.
The bass has relatively new nickel round strings on it - I have a bit of foam under the bridge but otherwise nothing has changed. The strings have had a couple of rehearsals and some practice sessions but they're really only just breaking in.
Could the newish strings mean the overtones are more prevalent? Or am I really just that crap at muting strings?