agreed. it's nothing to do with being summoned.
I think MQ2bot plugin, when it detects an add, records your loc or tells mq2melee to do so, or something. Then when *certain* adds die, it tries to reposition you there, which might well be a very far away "back there".
This is bad if you get aggro on only part of the total list of mobs you will fight. I am regularly able to cause multiple toons to head back to some far away position mid-battle.
It happens with no mq2bot autofollow on, and I don't use any other methods of navigation for this situation. Either group leader moves, and all auto follow, or they stay where they were told.
So, mq2melee or mq2bot interacting with mq2melee, I guess. Or mq2bot interacting with MQ2advpath which I don't use at all either.