changing member data not possible by superuser/moderator

Since short as a superuser I can't change data of members. By starting an existing member profile, automatically name, username, emailadress, password etc of myself as a superuser is automatically filled in instead of that of the member.
What do I have to adjust in order to prevent these not wanted adjustments?

Sounds like your browsers autofill is filling in those fields. We already set the necessary autocomplete attributes on inputs to prevent this, but browsers and browser extensions don't have to respect those attributes. This is a common problem if you're using something like LastPass which has over aggressive autofill.

Thanks for your quick reply. You are right about the cause of the problem. I am using Lastpass. I switched it off for CB and the problem was solved.
Thanks