I agree.
So please check again the issue i try to describe but looks like it is not understandable.
So in my example the user "anne-alexandra-fortin" deleted using his profile/preferences his userid "2655-" in order to have more friently URL, staging1.sitename.net/anne-alexandra-fortin instead of staging1.sitename.net/2655-anne-alexandra-fortin.
The friently URL displayed his profile with Jomsocial 4.7.9
But from the moment i installed Jomsocial 4.8 'anne-alexandra-fortin' profile (staging1.sitename.net/anne-alexandra-fortin ) does not display.
The user is not deleted, but still in database. I mean if you use his userid "2655:" in URL then profile displays fine.
Check staging1.sitename.net/2655:
If Jomsocial 4.7.9 reinstalled, the profile displays fine either way, no problem.
Only if Jomsocial 4.8 installed, the profile dissapears if alias is only name with no userid in front.
I hope issue of jomsocial 4.8 is more clear now.