mine has been currently fix.
View: https://www.reddit.com/r/ZephyrusG14/comments/njn8xi/audio_cracklingstatic_but_only_in_silent_mode_on/
change the wlan power options to maximum performance from the battery power plan
its not your laptop problem...i think is the windows 10 i have the exact same issue with my new laptop also i experiences this issue with my helios 300 but i dont remember how i solve it....i think there is something to do with power saving mode even i set it to performance