Cracks along steps most commonly point out flex issues; give a boost to with staples

https://blast-wiki.win/index.php/Expansion_Joint_Failure:_The_Hidden_Source_of_Swimming_Pool_Covering_Cracks_and_Deck_Damage

Cracks along steps routinely imply flex issues; beef up with staples and occasional-decrease mortar to forestall habitual area fractures.