When you edit a Master Measure that is ONLY used in an expression you do not get a warning of the change impact. This is different from master measures used in charts where you have to accept the warning dialogue.
It is frustrating as you cannot easily identify which master measures impact which expressions.
Please also see https://community.qlik.com/t5/Suggest-an-Idea/Automatically-adapt-changes-in-master-measure-naming/i...