Minion bug next to tower.

While playing a game between 00h00 and 01h00 (central African time) in mid lane I saw that a minion "got stuck" right next to outer tower for probably 2 seconds. My ping is usually 160 - 200 but i didn't check right that second. but my character didn't jump around as though it was a ping spike, therefore i don't think the minion not moving was part of lag.