I had Grenado bound to a celestial power (sorry, don’t remember which one). I used a Tonic of Clarity and Tonic of Reshaping to reset my attribute and devotion points. I was then unable to reclaim the final point in Grenado - please refer to the attached screenshot. I tried resetting the session, binding and unbinding Grenado to a celestial power, and speccing back into all other nodes before trying to reclaim all points again, but none of them worked.
Edit: In case it matters, Grenado was bound to Twin Fangs. Hooray for backups!