I noticed that with Empyreal Bond and Transcension but it probably also happens with Hellspawn:
When character AP is too low to use normal respawn button but high enough to (theoretically) use the special discounted skill-based respawn, the button for that respawn is enabled but using it results in error "You do not have sufficient power to respawn!"
Sample screenshot:
Skill-based respawn not possible on low AP
Skill-based respawn not possible on low AP
My characters (sorted by IDs): Badziew, Tiger Fist, Pilgrim, Sentient Spellbook, a trojan cat.
Check my wiki profile for more information, including contact information.
Check my wiki profile for more information, including contact information.