It's been a serious problem.
It's not my internet or on my end for sure. I've tested everything while it has been going on and everything leads to it being server-sided.
I can't say how everyone else is affected, but mine starts with a lag between going from champion select to the loading screen. After which, every 2-5 minutes in the game it continuously gives me the "Attempting to Reconnect" message and I cannot move or use skills, however, I can see things going on in the game just fine as if it's not lagging.
For example, I can see people moving correctly and using skills, warding, ect. Which when I have lagged in the past, it either continues the other players down their clicked path or stop moving period and you can't see them use skills or ward.
The other funny thing is that this issue only occurs for that specific game. Afterwards it doesn't persist and only affects 1 out of every 5-7 games or so. So it's very jumpy and why I think it may be a faulty server or something.