No idle unless I blip throttle for 7 secs

[JGunn]

My 2007 GZ dies at every stop. So, what I've learned to do is after stopping I will ever so lightly blip the throttle until the bike starts idling again. So, I don't have an idling problem per se, it just dies when I immediately close the throttle when coming into a stop sign. Sometimes when the bike dies it is unable to start again and I have to wait about 10 to 20 seconds and then the bike starts fine...only sometimes though. Other times it will die and have no problem starting right away. After riding for 20+ minutes, however, I no longer have this problem and bike rides fine. I've ridden with the bike in PRI and ON on the petcock and that doesn't make a difference. I will say that if I leave the choke on I will not have this problem, however, the bike naturally will idle extremely high. I thoroughly went through the carbs and they look great. I've adjusted the pilot screw AT 1.5 turns, 2.5 turns, and even 3 full turns. Doesn't make a difference either way. Looked for vacuum leaks by spraying starter fluid around the boots. Nothing changed. Rode the bike with the gas cap off to check with bad ventilation. Nothing changed. I even tried bypassing the air cut off valve and that made the bike run worse. Any suggestions would be helpful.
Not sure if it's related but sometimes the turn signals work and sometimes they don't. Just wondering if there's some weird electrical thing going on here that might affect the idle. Thanks.