There is also another glitch with the fairy, a more cruicial one in my opinion, as it is already described in the german bug forum(accepted bug) and I send a ingame mail to support, I dont go much into details.
I really hope they gonna fix this fast.

It is possible to maintain all fairy buffs at all times by resummoning it in midbattle while setting it on "Sic". Option "Sic" ignores fairy buff cooldowns and uses it always when she thinks its appropiate. In my eyes this is some toplevel glitch and can destroy all your gameplay in savage raids if people use it and pvp it could be abused aswell. The wonderful thing is that you can even combine it with the sacrifice glitch, resulting in some overpowered scholar.