Current, the Paladin’s class spell Lay on Hands (LoH) is triggering a “Spell not learned” bug, whenever the talent “Empyreal Ward” is not learned and the LoH is casted by “/cast” command (instead of clicking the icon).
The Lay on Hands (LoH) is frequently cast by a mouseover macro, a @player macro, or a similar macro in raid, in M+, and in PvP situations. All of these macros need to cast the LoH using the “/cast” command.
One possible way to fix:
Use 2 different spell names, because currently the LoH’s spell ID is different with and without the talent Empyreal Ward — For example, “Lay on Hands” & “Laying on hands”, or “Lay on Hands” & “Lay on Rightful Hands”.
Players’ workaround before this bug is fixed:
Either use the Lay on Hands macros with the talent “Empyreal Ward”, or use the spell icon directly without the talent “Empyreal Ward”.