{Bug}? "self-cast" on Paladin class not working

I have not been able to self-cast with my Paladin. I press/click the button or key and the cursor highlights and no spell casts unless I mouse over my target frame or select my character with the “F1” key. I only noticed this during my raid last night. This applies to the spells Flash of Light, Word of Glory, and Lay on Hands.

I have tried turning on/off the “Auto self-cast” option in the game’s Options menu with no success. Moreover, I have reproduced this “bug” with addons and no addons enabled.

The expected result is that the spell casts on my character unless I target another character or use a “@mouseover” Macro. added the correct word, not