I consider this as a stable update. The updates after this one will have a lot of changes and might have some issues at first.
Obviously I will do my best to catch any issues but if you really require stability stay on this version (3.13.25) for a bit. I will give more info when the next updates arrive, they might not have issues at all, this is just a warning ahead of time.

Changelog:

• Added worldguard region exclusions for NPC spawning. This setting will replace the old "No Spawn In WorldGuard" setting since you can now define specific regions to block spawning
• Improved PvP protection against end crystal explosions
• Made the message shown when players are blocked from logging in configurable
• Fix a concurrent modification exception that could happen on plugin shutdown

Github for bug reports/suggestions: Issues