Spells in spell book disappear after using morph spell

[RedFlash]

My spells disappear in my spell book when my hero uses a morph spell(metamorphosis) anyway to fix this

 

[howl2000]

I'm pretty sure you have to add all the spells back to the morphed unit with triggers. I couldn't find the thread but there was one one week ago with the exact same problem.

Here's one post just used search morph