July 2018
In BF1, if you were on fire from fire, whatever the source may be, and you jumped into the river or a significant water source, the water wouldn't douse the fire from you immediately. It may act similarly to proning when you "stop, drop, and roll". But, realistically, it should put the fire out. I hope that this will be the case in BFV.
July 2018
I agree.
I always found it weird that jumping in water wouldn't help put out the fire :P
Even if you threw an Incendiary grenade in the water, it would still work.