Ok that’s a front end issue. Do you have one card that’s much wider or something? You’ll need someone with more experience of the front end side. It’s not an app related issue
Happened to me a few times.
Have you checked that it’s not a sensor displaying incorrectly putting the whole column out?
Mine did that when a zwave sensor went offline and appeared “not available”.
The sensor name was so long!! (not the friendly name) it messed up the formatting of the page.
If you can hide any missing sensors, that may be a start
Thanks @TomBrien, @Rural_assist. I’ll start by deleting the ‘under construction’ bits of my front end. I should be able to find it by the process of elimination.