Possible Manticore bug in Master Expeditions

gromovnipljesak

So the manticore boss... I'm not sure if it's a bug but it's doing so many backflips it would likely vomit after fighting me for 3 minutes.

It seems like its the only attack it has available. No claw attacks, no tail attacks. Just backflip with that annoying GOD HAMSTER DARNED poison+knockback loop. Knocks you back, poisons you, attacks again with the same thing, stunlocks you if you're unlucky. If it corners ya, you're just dead.

bigman99

There were a bunch of bugs and issues with the boss mobs in ME's when Undermountain released. This is one that was reported, along with its AoE sometimes facing the wrong direction. The only issue I ever remember them fixing was a bug with the purple worms that cause them to not reappear. They couldn't make it work, so they removed the mechanic. After all this time I very much doubt anything about this fight will change.
My suggestion is to take the fight a little more slowly, don't spam your encounters and at-will and look to make a hard strike, then back off to see what he does. Move in, use encounter/daily, move to the side. It will take longer, but it will keep you alive.