When we are in battle and Engine (Other player) is on move, spells are unaccessible.
And when engine is switching between stacks, there is brief moment when Spells are accessible.
If we for example select blind, or slow spell the game engine will reset our choice.
Sometimes players forget about this bug due the rush of the moment.
Which lead us to loosing choice of correct spell healing/slow/blind/pacification/time stasis...,
which in return could lead us to loosing time or units.

It would be nice not to show spell choice,
or not to reset what we have already chosen.

Whichever is more correct, personally I would prefer later.