Event registration 'save and add another' doesn't work correctly

One-sentence description

Current behaviour

After manually adding a registration in the event admin using the button 'Save and add another' I'm redirected to the overview instead of getting another add form. The message is correct, but the page is not.

Also, 'Save and continue editing' seems to have the same behaviour.

Expected behaviour

Get the add form instead of the overview

Steps to reproduce

1. Create a registration in the backend for and event using 'save and add another'
2. Get the overview instead of form