login happens with wrong user

Created by: christophfroehlich

Frequently it happens that after the successful login of user B he is logged in as user A, which was already logged in before. If this happens, there is no entry in the event log of user B after the login.

I've got no clue if this is related to server-side settings or partdb-related?

0.6.0-dev, partdb recognizes php 7.1.25, .htaccess is not configured.