No nothing to do with the nest specifically, i had my 5g network set to
a specific channel but changed that to "auto" so it just chooses the one
it likes best and the noise went away for a day or two then came back so
maybe it was just a coincidence....
Update. Yesterday Morning I changed my Apple Airport Extreme 5g from a
channel I thought was best to "auto" channel choosing and the static has
gone for now. Will continue to test this week and report back.
Going to test this again. I tried a single one the other day after
unpairing to test exactly this also and it crackled. I'll try again
though with the other unplugged and also test both (I only tested one)