Strong fizz/noise not coming from Guitar

Has anyone else encountered some noise/fizz sound that was constant?
I thought it was my guitar firt as when I grounded the strings with my fingers the sounds went away
I unplugged my guitar and the sound was still there, actually much stronger, replugged my instrument and suddenly all was fine, like magic!

high gain amp in the preset?

not really, they are capture.
there was a clean and moderately high gain one, it happened on both.
there was a noise gate a the beginning of each path.

I noticed it happened after I rolled the volume high and low many times on my guitar… really strange