For some reason the calendar App in web or is not working correctly. I have attached a screenshot of the web and a PDF export (PDF is working how is supposed to)
If you haven't already, I would suggest reaching out to Smartsheet Support and create a ticket for an issue like this (click here).
You may want to try some basic troubleshooting steps and provide this information to Support, such as fully logging out and in again, trying different browsers, and checking if other shared users see the same thing.
I have the same issue - the top row is not showing up.
I also have the same issue...
I stumbled on this while I was experiencing the same issue. The calendar app webpart was cutting off the top row of my calendar in a dashboard. I fixed it by adjusting my browser zoom to 100%. I think due to my laptop screen size it defaulted to 80%. I hope this helps!
I'm currently having this problem as well!