Ok, probably not at all related, but.. you never know.
I had a very similar problem with my RRS, where my acceleration would lag for a second and then all of a sudden a plume of black- purple smoke would come a bellowing scaring all behind me, afraid of an impending explosion. Turned out some rodents (squirrels, chipmunks, who knows...), as the above pics show were hoarding my dogs food and making a nest in my air filter, and chewing through some wiring harness that controlled the fuel regulator or some crap.
So, maybe you have a faulty wire somewhere that LR could look into, and hopefully not a pest problem. :lol:
Just a thought...