The buttons link though to the activity tab

and subscriptions tab

But if the "Ultimate Member Profile Forum Tab Integration" is disabled in Dashboard > Forums > Settings > Features then 

the button link to activities (or subs)

cannot display the activities (or subs) tab, so goes to the main profile.

This isn't what the user would expect.

Rather what should happen is that those buttons under the user avatar should disappear if the UM profile tab integration is switched off so the user can't link through to pages that don't exist.