Pet pathing with bard speed is a little goofy. Pets with >85% run speed buffs tend to run through the mob and then engage on the opposite side. Generally speaking, this results in pets facing the front of the mob and getting riposted to death.
I don't know if it's a client or server side calculation that does pet pathing, so maybe there's no fix possible, but would be great to have pets engage mobs from the side they approach from. Or have pets always behind the mob like melee bots

Also, with bard speed, pets do engage on the proper side if they are sent to attack when already in or near melee range of the mob. It's as if any moderate distance causes them to overshoot their pathing every time.
Thanks for your consideration!