Short version: When using a respec shrine on a Redguard character after Update 11, the character has one fewer skill point. This only appears to affect Redguard characters (I only tested Breton, Dunmer, Altmer, Bosmer, and Redguard), and only affects characters on their first respec after Update 11 (subsequent respecs are fine).

Long version: I have a character with 162 total skill points (157 spent, 5 free) that I wanted to respec. I went to a shrine, and noticed that the cost was only 7800 (156 points) instead of the expected 7850. I thought that this was strange, but I went ahead with the respec, and the on-screen message indicated that 156 skill points were refunded (instead of the expected 157). And my total skill points are now 161 instead of 162.

Screenshots before and after the respec:
Which characters were affected: After this, I sent every one of my other max-level characters to a shrine to see what their respec cost was and to see if it matched the number of points they have spent. My other Redguard character saw the exact same issue: the shrine was charging 1 less skill point than expected. All of my other max-level characters (Breton, Dunmer, Altmer, and Bosmer) saw no issues at the shrine. This leads me to conclude that this bug is race-specific.

What happens if I try to respec again? On subsequent interactions with the shrine, there are no further losses of points. This only affected the first respec that I did after Update 11. Subsequent respecs on the same character are unaffected.

Is the addon tallying skill points accurate? Yes. It is fully updated. The count that it provided agreed with the shrine's cost for 5 of my 7 characters. Finally, I did a manual tally (and re-tally) of all of my skill points on both of my Redguard characters (and yes, I was careful to not count skill points that were passively granted and cost no points), and the manual count agreed perfectly with the addon's count. Since the tally is in agreement with the shrine on all 5 of my non-Redguard characters and since it is in agreement with my own manual count, I am fully confident in the numbers provided by this addon.

Final notes: Since I am myself a programmer, I like to double-check everything before I report it as a bug. In this case, I manually counted (and re-counted) the spent skill points in second Redguard character, the one that I have not yet respeced. She has 147 spent skill points, and the shrine is listing a price of 7300g (146). At this point, I am 100% certain that this is a bug.

@ZOS_GinaBruno @ZOS_JessicaFolsom Please take a look at this.