When I test an inactive survey, and then change questions in the survey (either adding new questions or editing existing questions), and then use the "Back" button in the previously opened "Test survey", limesurvey is not responsive anymore and my webserver load goes from 5% to 35% and stays there, until I restart PHP-FPM manually. Probably some kind of endless loop? I can reproduce this every time.

This is especially annoying because of the forced PHP restart, otherwise it would be a minor problem, as it is seemingly only occuring in the Testing phase. Still, it is somewhat dangerous, even more so when multiple people are working on a survey and testing it.