Hi,
On the site https://xn--lieblingsstck-secondhand-5sc.ch/ you can slide in the off-canvas menu by clicking the hamburger, then if you click on 'Härzstück' or 'Über Mich' or 'Impressionen' it jumps to the related section, but the off-canvas menu remains open. But it should slide back.
Thanks for a hint
Joomla: 3.9.25
SP Page Builder: 3.7.9
Helix 3: 2.5.8
Menu Type: Mega Menu & Off Canvas