Names of Guests in surveys are not available it shows only "guest"

When analysing the surveys in a meeting where guests can also register, the names are not displayed.

I have a meeting and a survey in which everyone can participate, I did a test and registered as a guest where I can also enter my name.
If I now take part in the survey and then look at the results, I only see Guest in the name and not the name entered by the guest.

So I can not do any analysis of the result because I only see Guest as name.

The anonymised participation option is switched off.