Could ZZ'Rot Portal's spawnlings have tower priority?

I used this item a few times and occasionally, the spawnlings get stuck in an infinite loop fighting the minion waves. By the time the minions kill the spawnling, a new one has spawned and just pulls the agro of the same cluster of minions over, and over again. And for the full duration of the portal, the spawnlings never once hits a structure.

Another way this could be fixed is to alter the spawn rate to about 5-6 seconds but increase the damage of the spawnlings so that they dont synergise with the minion spawning.