We are aware of an issue currently affecting the new Castellan Set. One of its effects is intended to spawn mead units during defensive Courtyard Battles against other castle lords in standard PvP combat. However, due to a bug, this effect is also incorrectly triggering in defensive battles outside of standard PvP, where it is not supposed to apply.
Our team has identified the cause and is preparing a hotfix that will be deployed shortly. Once the fix is live, the effect will function as intended and will only activate in non-event PvP battles against other castle lords.
We appreciate your patience while we resolve this and will keep you informed should there be any further updates.