Logs:
If you need any logs, let me know but since it isn't a crash I didn't add any

Steps to Reproduce:

1. Get egg, in my case I tried the vanilla egg and the ghost egg I found in a mineshaft
2. Place blocks in 3x3 for corresponding breed, like netherrack for nether (tried it with a dragon from even more dragons first but the nether is a main dragon so that's why I tested it with a nether dragon before posting the issue)
3. Place egg and activate it, it doesn't change breed and the end dragon or ghost dragon hatches after a few ingame days

Checked the config and yes the change breed option is set to true

Description of issue:
Basically the steps to reproduce perfectly describe the issue, it isn't changing breeds despite the config being set to true