Minion Completely Stopped Moving

Mid lane minion stopped in place and wouldnt aggro enemy team. It stood there for about 2 minutes until the push stopped and enemy team were standing by it without aggro, and did eventually kill it.

Happened late when we were at inhib tower so it didnt have as big an impact as it couldve early. But was obvious bug.

Note: im 99% positive it was sitting directly on a ward and could be abused if able to do this early.