How to start US MM's nowFollow

Has anyone done the Undershore MM's since the patch? Progenitor has always been my fav mm since it closley resembles an actual group and takes close to the whole 45 min to complete. So that way you feel like your actually earning your xp and you don't have downtime.

The mindbuds now seem to have a lot more hp than they used to, maybe 20k? Used to kill them in 1 hit. But now when you loot the shroom from them that brings up the option to start 1 of 4 missions, nothing happens. Has anyone been able to do them or is it just bugged?