Data usage during play

I play on a connection with a monthly data cap, so I have to watch my usage a bit. After coming back to WT today, I noticed the data usage during matches is pretty high for a game of this type, around 1MB / minute. World of Warships uses maybe 1/4 that much, and Dead by Daylight half. I just want to ask:

Is this normal? I feel it used to be lower. Any chance it’s still downloading stuff in the background, or is there some setting I can use to reduce it?