I've been having this issue for awhile now. and some of my friends have this issue.

I'll be driving around near a base within 50m or less and the game gets laggy and sometimes kicks me out of the game. I don't even have to be driving i can just walk upto the base and lag then be kicked within 5-10 seconds.

I once had a base in Novodmitrovsk and in order to get to the base i need to climb up a ladder, but i'll get massive lag half way up cause the amount of crates and barrels i had, but this issue would cause me to get kicked while on the ladder causing me die when logging back in. Thankfully there was another way around it.