I absolutely had this issue. My first real bass that I bought new years ago, and I still play, was a 96 Stingray 3 band….yes I was listening to a lot of RHCP at the time
. Any note on the G string was essentially non existent, I tried everything I could think of pre-internet. Finally when the SD Basslines pickup and preamp came out, I swapped out both with the alnico pup and 3 band preamp and the issue was fixed. I remember reading that the issue was related to the preamp voicing on the 3 bands, and in hindsight I probably only needed to replace the preamp, but this was before talkbass
My 2018 Special does not have this issue at all, and my 96 sounds and plays fantastic , it’s everything “Stingray” you always wanted.