Titan Boss Fight Minion Bug

While fighting the Titan boss in Titan Grotto, I was unable to damage the boss with any abilities. I believe this is because minions are causing some hitbox shenanigans, it happened with the Forge boss while he was trying to run into the lava as well. I un-summoned all of my minions mid fight and after the titan boss moved to a different area I was able to damage him again.