Collectible Card Game Headquarters

Describe the Bug:
When activating Summon the School 's ability by tapping 4 untapped Merfolk creatures, the former gets exiled.

Which card did behave improperly ?
Summon the School

Which update are you using?(date,name)Which type(Duel,Gauntlet,Sealed Deck)
JOU v1, duel

What exactly should be the correct behavior/interaction ?
When activating Summon the School 's ability by tapping 4 untapped Merfolk creatures, the former is returned to its owner's hand.

Are any other cards possibly affected by this bug ?
-

It doesn't get exiled (go to out of play zone) it just disappears. Also, the Rule Engine text reads "flashback Summon the School" when it isn't really flashback.

All fixed in 0063308

All original bugs are fixed.
1- Now there is the usual token bug: the blue merfolk wizard tokens are 1/0.
2- When you are prompt to tap you are asked to "select target permanent" instead of something like "select untapped merfolk you control".
2a- if you try to tap other permanent you aren't given illegal type prompt.(only rules engine and tapped permanent give illegal).
The Mechanism works though and only lets you select untapped Merfolk.

All fixed in 5501b20

Functions correctly (all bugs fixed) but the help text when you are asked to tap 4 merfolk to return it is messed up (lots of random charecters involved).

Everything fine here,fixed/closed.