random "Failed to connect to Instance"

Lately getting the error message and it disconnects me.
Happened in Lab when entering a new zone, maps or trying to enter some zones.
Deleted cache files from the two cache folders and minimap in data.
Error still occuring, not every time but every other map.

Is it a known problem or a fix for it?

Thanks

<----- same ....plz help

I have the same problem. I already unlocked ports. The connection checks out other servers. Paris, England and Moscow. It's always the same. You're fine for a while, then you get bounced every time you switch instances.

same.
10 maps
8 maps failed ...

Same here... 2 times uberlab key gone :/

Same here im always got the Error message.. :(( please help.

Same here :(

Saaame since league start, worked on my graphic settings alot but nothing seems to help for long.

same here

same here!!!!!!!!!!!!