Bug?? Movement around minions.

For a while now, I've been noticing a restriction in movement commands, particularly with melee champs around minions.

My champion will either get stuck on a minion ( where I see my champ turning left or right without leg movement as if breaking away ) then sliding a slight direction before being freed. This usually happens about a half a sec to a full second depending. This Movement impairment has led to a multitude of situational problems where paths have been deliberately blocked. ( Note: Its not all the time but it does happen within a noticeable amount )

And I would also like to note that some Attacks have a hard time reaching the target when you are chasing them Up rather than down.