This is in Sky Adventures - there is no Mystical Agriculture.
On Sky Adventures the ender dragon doesn't spawn an egg or end portal; You can't use Draconic Evolution to get a dragon egg because it...
I had this issue as well. Not sure why it happens, but I got around it by making some of the Cocoon of Caprices from Botania. They're pretty cheap...
Completely forgot about those things, I've never had to use them.
Thanks for the info!
I've killed the end dragon 3 times on the Beyond server and it hasn't spawned an egg once.
Went into a SP world & killed the dragon and...
Separate names with a comma.