I know the reason of this bug.
If yo learn chromatic orb from scroll example lvl 1.
And after that you level up to lvl2.
The game dont recognize that you already have it.
And you can learn it agan on lvl up screen .
After that its bugged and you cannot cast it any more and there is no fix.
I hope this will help.
Does that mean only learning it at level 5 prevents the bug?
