select-list-card visual errors when displayed in a grid

[sesquipedality]

Checklist:

• I updated to the latest version available
• I cleared the cache of my browser

Release with the issue:
1.2

Last working release (if known):

Browser and Operating System:
Windows 10. Firefox (latest public release)

Description of problem:

When used in a grid layout, the rounded corners of that layout are ignored and the card shows itself as a rectangle, breaking the lines around the card.

Card should have rounded edges

Javascript errors shown in the web inspector (if applicable):

Additional information: