Any idea what causes the layout to look like this?

Happens in the designer as well as on a phone. Android ver 11. Does not always happen, but when it does it is when i first enter the tab.
If I click onto a list item which takes me to details and then come back to the list. All is well.

Well that did not work. Let me try again…

I think this is a known bug with the cards layout, been like this for a while.

OK thanks.