Site not responsive in Chrome

Hi there,

I made some changes to my site in the tablet version. Since then, the site is a complete mess when I publish it in the Chrome browser (version 114.0.5735.133). The published site looks totally fine in Safari and Firefox and also everything looks good/as before in the editor (on Chrome).

In the published Chrome preview however it seems like the responsiveness has completely vanished. When changing the size of the browser window the site is just scaling the design, there are no breakpoints anymore.

I tried to empty the caches (on all browsers) – did not help.
Can anybody tell me, what I’m doing wrong? Help much appreciated!

Here is my site:

Here is a little video of the problem: