2016 Assault bog issues

So riding sicamous this week, noticed on the trail up, that if I gave er then let off for a curve, and feathered back up from the 6000 range, it just bogs out until I pin it.
Seems to only happen in that range, mostly around 6800 I've noticed though.

Trail down was perfect today. Didn't skip a beat.

Any ideas?

I have a MBRP stainless trail can on it. Fresh plugs. Maybe 500 kms

Also, yesterday, climbed to a ridge then stopped for 20 mins, then it would bog out and die if I gave it anything. Had to idle her down a hill and had no throttle for control lol. 30 secs later, it was like nothing happened.
The CEL did flash a couple times, in no consistent way, but hasn't done it since.

Also did this today while climbing and had to turn out. 2 mins later, fine for the rest of the day.

I don't see anywhere alot of snow or water can get into the airbox.

Chitty gas?

Don't really wanna take it in if I don't have to. Out of warranty last week. Of course.

Thanks for reading.

I would try adding new fuel first. Possibly a tps issue as well. But there can be so many other small issues, like water getting into a plug somewhere, or a pipe sensor loose or faulty. Check everything, and get dealer to hook up lap top.

Broken primary spring?

Yea, I figured I'd have to dig in a little more. Thanks

Buddy’s ’15 RMK did the same last weekend, partway up the trail started bogging in midrange for no apparent reason, rest of the day it was fine

Had the same issue running 94 petro fuel. Switched up to shell 91 his past weekend and had no more bog