I've been having this issue on and off the last week or so. It's why I haven't been playing in league recently; pvp1/2 has not been very reliable for me, lately, and I don't want to cause any disputes or drama or anything. I got lucky in the weekend's tournament, and my connection seemed to be okay then, although even there I had two games where my opponent got in without me and another where my opponent got the empty hand bug; I have no idea whether those are related to this issue or not, though.