christian-harel Have tried to change "Collapsed Menu Behaviour" to "Off-canvas" in template settings. Ref: Screenshot ensuring that off-canvas menu is shown in responsive mobile mode however the change isnt reflecting on site
You may check with your hosting provider if they have some server-side caching enabled due to which modifications or changes might not reflect at times. Due to this, the site might store and reflect old webpages irrespective of changes or modifications being done at times due to same being enabled