Blight Bosses Failing To Spawn

Not sure what causes it but its brutally frustrating, considering the investment of doing juiced blight.

There is something that causes the bosses to not spawn and get stuck and become untargetable.

It prevents the blight from finishing at all. And with the investment of the strat the least you could do is have a button to just accept the loss and at least finish the blight.

Its so absurd that you just auto lose the map if the boss fails to spawn from spawner in the respective lane.