GoggleHat
2020-10-14T21:53:26Z
According to its text, Cipher Ex Dragon should be able to be summoned by using any "Cipher Dragon" monster as material, whether they are Xyz monsters or not, but when a monster is taken and turned into a Cipher Dragon via the original Galaxy-Eyes Cipher Dragon, it isn't read as a suitable material for Ex Dragon.
Steeldarkeagel
2020-10-15T15:31:03Z
Works fine for me.

Can you supply a replay stating when you tried to Special Summon the monster in question and were unable too?