Клонирование на новый сервер: смена домена. Новая тема: требование входа при каждом посещении

Many thanks for this info.
Problem solved with your help.

In safe mode it worked ok.

Exited safe mode and as long as I disabled each plugin I retested the functionality.

One plugin was causing the trouble.

But fortunately when I reenabled it the functionality worked ok. I did not know what happened. Maybe a remap on backstage when I disabled and reenabled it.

Problem solved