Yup. Been caught by that before. Use RefreshMappingInfo quite frequently now!
The way name maps works still feels a little klunky in places (mainly around sharing and lack of ability to do things dynamically with name maps during a run) compared to the object repository in QTPro/UFT. But I do like the Alias feature allowing you to create a much more human readable "version" of the application compared to the full object map at system level.
IF .... it's used properly.
The number of people I see using an Alias which is a straight copy of the Object Map object still astounds me.
Simply bolting the word "Alias" onto an otherwise still long and horrible to read collection of objects doesn't achieve anything really ....