Hi Torsten,
thanks for your response.
The issue appears on mobile phones. In my case, it’s an iPhone 15, and I’m using Chrome. The Thrive support tested it on an Android phone.
I recorded another short video to demonstrate: https://photos.app.goo.gl/e6fXqHAJL6xh3RNz7 (Please ignore the audio).
The first time clicking on the hamburger button, the menu disappears again (not each time I load the website, but most of my trials). The next time clicking on the hamburger button, the menu is stable, as it must be.
Kind regards,
Dennis