Lay on hands is bugged sometimes. It’s been adressed a long time before but it just keeps being bugged. I wanted to bump the topic because it’s been months and it’s still bugged, but I can’t post on the US forums. So i’m adressing it here again.
For the original discussion look here: https://us.forums.blizzard.com/en/wow/t/lay-on-hands-macro-bug/2002472