TFT "bugs"

Hi, I have being playing TFT and I notice some "errors". First of all the fact that sometimes the champs just stand still without being stunned and dont hit no one. Second some skill and class glitches like in Kindred ability it says that he creates a area to prevent allies from dying but its also preventing them from taking damage. Another thing is the assassins which descriptions is that they attack the furthest enemy but I've seen them going in the first one they see not the furthest.