Character not responding

The last game I was playing my character was not responding to my clicks. When I was right clicking to cs or to move around my character was not responding at all, it was also happening with all my abilities. I was watching my ping and fps and both were in the normal range 70-80 ping and 60-80 fps. Not once did my ping of fps drop when my character was not responding. I ended up tabbing out and closing windows I had open and ending processes that were running in the background. Neither of these things did anything so I ended up restarting league. Once i got back into my game everything seemed fine and I did not have any more problems with it. In that same game though my top laner was also complaining about the same issue i was having which ended up reminding me that this was not the first time this had happened, the other night i was experiencing this problem for one or two minuted before it went away. I came onto the forums to see if anyone else was having a similar problem and if so how long has it been happening for you.