Snorkelled 2012 sportsman 500 HO

Hey boys! I’m having a stalling issue with my 500. It has a triangle atv snorkel kit. All the snorkels are sealed well with no leaks. But when I get in water that’s about up to the seat, the quad stalls. All electrical connections are dielectric greased, except the spark plug isn’t. Have no idea what is causing it to stall, any help would be greatly appreciated!