my sensor cards have no thick top line, my sensors are barely readable. It is really weird, sometimes they are there, but most of the time they arent there.
Second picture as example what it should look like
You’d be better off asking whoever designed the theme you are using, or include your theme configuration at least.
Even without a theme for the view and cards, the error is still there
The image you have shown is not the standard default Lovelace dashboard.
No, but even if i change the overall theme of the view, and of the cards it still doesn’t show up (which i don’t have a screenshot of). Weirdly it looks correct on my desktop. But on my wall mounted tablet it doesn’t have those thick lines
If this is on iOS mobile app or safari, it looks like there’s a fix in for the next release: