Having an connectivity issue - getting kicked from server every 30-50 mins

Never have I experienced anything like that - for some reason this league I have an issue that approx every 30-50 minutes I suddenly get a lag spike, my ping flyes into the space for 4-6 seconds and I have like a 20% chance that game will catch up, otherwise I just get kicked to the main login screen without any warning or anything.

Things I debugged on my end:

* Connectivity stability - I put a test running in the browser that pings 4 different countries continuously and as soon as I got kicked from the game, I looked to that test and saw nothing happening for the last 5 minutes, so it is not an issue with my internet provider.

* Changing servers - as I live in North Europe, the closest one to me is the Moscow server, my initial thought was that maybe RU server is laggy, but nope, servers in London and Paris behave exactly the same way for me.

Right now re-downloading the whole game client from scratch, as some one suggested in chat. But not too much hope for this one...

Worth mentioning that differently from other players, I don't get kicked for "too many actions", I had this error only once when during a lag spike I was rage-tapping Q for my movement spell, and when the game started catching up I got kicked for this reason. But in all other hundred cases I just get kicked to login screen without any message.

I have been having this issue for the whole day!
When I have time to play this happened, now I'm going to work.
I can only expect the problem is fixed when I get home.

I was getting disconnected without any warning or messages.
At same time I've run a connectivity test and nothing..

Something is going on with the servers.

As expected - re-download did not help, no idea what else might help...

I have been experiencing that since day one, so like for a whole week, in total I have been kicked out like over hundred times, it's bearable when you do mapping, losing 1 life out of 6 is not a big deal, but in heist... Just lost an exalt orb because got kicked while running back towards exit.

Oh well, actually, remembered how I got kicked from half looted catarina with no portals left :/