Titan not spawning in Slaughter Shaft

Been doing Slaughter Shaft and out of my past 5 runs Titan has spawned twice. Torgue announces his spawn and then he just doesn’t show up. Both times he did show up he dropped maybe one green. With how many issue Tremendousa Rex has getting our of his spawn and The Slaughter Star some times ending before you even kill Red Sun or Blue Meteor I think all 3 circles of Slaughter matanince.