https://nwn.fandom.com/wiki/Mind-affecting
- The mind-affecting effects are charmed, confused, dazed, dominated, ---frightened---, paralyzed, sleep, and stunned. Any attempt to apply one of these effects to a creature with immunity to mind-affecting spells will fail. As exceptions, stunning fist and death attack bypass mind-affecting immunity, even though they inflict mind-affecting conditions (stunned and paralyzed).
---frightened--
- This is a mind-affecting effect and as such it can be blocked by immunity to mind-affecting spells.
so the old version should have.
New version should too, as we wanted to make it boost the saves, instead of have blanket immunity, but we didn't decide to remove anything from what it boosted saves for.