Thank you for your response and suggestions.
I have followed your advice and checked the server-side caching, but it has been deactivated since last month, so that doesn’t appear to be the cause of the issue.
Additionally, I tried unchecking the Block editor option as you mentioned in Events > Settings > General, but unfortunately, the issue persists, and the Event Calendar view still switches to the mobile version on desktop devices.
I did some research and found a similar case on your support forum (https://theeventscalendar.com/support/forums/topic/responsive-breakpoint-filter-not-working/). While the theme used in that case is different, the symptoms seem to match the problem I’m experiencing.
Since our website is built entirely using the Divi theme, switching to a different theme is not a viable solution for us. I’m wondering if you have any specific solutions or suggestions tailored to the Divi theme to address this responsive breakpoint issue.