[Gameplay] Jungle Monsters not Aggro-ing

I was jungling as the other day, and I noticed that after I used Alpha Strike on my blue buff, the main target of the attack, the large golem, did not resume attacking me when Alpha Strike ended. The smaller ranged enemies continued to attack me. Once I noticed it, I clicked away and re-attacked the large golem (I didn't want to get an upper hand from a bug. Master Yi is already strong as it is). After that, it attacked me as if nothing happened.

I am not sure what caused it, but it did not happen again in the two other games I played. And as my game won't launch, even after I have tried a lot of fixes, I cannot test it further.