Sometimes recall spell consumes a lot of mana and some health
It happens to me often. Not sure if it's some kind of hidden game mechanic or a bug.
I have a runebook with runes marked to different mage shops around the world.
Often after using a recall spell from the runebook I see some of my hitpoints is lost and about 40% of mana is lost.
Here is an example:
HP: 124 (before recall) -> 122 (after recall)
Mana: 199 (before recall) -> 124 (after recall)