Ran into a bug though, I got a Seed Bearer when I ran one of the new mission stages.

Got "an error has occurred," and every time I loaded into the game again (regardless of refreshing cache, closing and reopening browser, etc) it loaded me in up until it generated the list of boss-mobs and then "an error has occurred". So I couldn't do anything except spam crash.

I filed a ticket, a couple minutes later I reloaded and no more crash... and the seed bearer was no longer in my boss list. It got wiped somehow, despite me not even pinging it (no rewards for defeating it) and not sharing it either. And shows as Escaped in my boss-raid-list-history.