Not sure if a bug or not to be honest but I’m on the latest iOS version and finding that with a particular card I’ll highlight a chunk of text I want to strike through. In its current state it’s one line bold, next line standard.
I highlight 4 lines 2 bold, 2 normal
Bold
Normal
Bold
Normal
I scroll across the formatting menu and select strike through and it does nothing- if I select task as a comparison it’s changed those lines to tasks. If I undo and try strike through again it still does nothing.