If I may ask you, could you send him to this link?
I made this thread a long time ago and it is a huge pool of editor bugs, validated with veteran mapsters. They may justify my lack of knowledge on certain points, but for what’s truly broken, it is still a very relevant source of tested bugs.
A lot of people report smalls bugs here and there and it’s often small data inconveniance. In my case, it is a lot of hard coded functionalitlies that are simply wrong.