I will try to be as precise as possible (my English is not crazy):
On the Sorceress if i take a spell that is not taken outside of trixion (with tripods included). The spell will not be cast.
If I take this same new spell but without putting tripods on it, it can be cast. (but that useless for a test)
This includes all the spells in the Sorceress kit.
I haven’t tried on other classes, but in the case of the Sorceress, this bug prevents from testing new builds unless you delete an existing spell set before entering Trixion (or using blue crystal to buy a new spell set)