Currently it looks like a wizard can learn any spell if they are high enough level, this includes cleric spells from scrolls found (have confirmed a Wizard can currently learn both Healing Word and Guiding Bolt). Unsure if this was put in by design but I believe this will very much make clerics mostly obsolete if wizards can still do all the cool wizard spells, but also function as the healer of the group. Otherwise if this is a bug, it seems like there's just currently no lock on what Wizards can learn from scrolls specifically, but the check to make sure they are high enough level to learn it does seem to be in place. On level up it does seem like a restricted list for new spells as well.
