[Theme: Customizr] Featured posts images displaying outside round div

I’m testing out the Customizr theme on my laptop so I can’t provide a link to demonstrate what’s happening but basically, the images for the featured posts on the home page are displaying as a square image with a white circle in the top left corner which expands to cover half the image with a mouseover.

In the absence of a link, I have attempted to represent what is happening through the medium of ASCII art!

No mouseover:

+――――――――――――――+
|/ \¤¤¤¤¤¤¤¤¤¤¤|
|\_/¤¤¤¤¤¤¤¤¤¤¤|
|¤¤¤¤¤¤¤¤¤¤¤¤¤¤|
|¤¤¤¤¤¤¤¤¤¤¤¤¤¤|
|¤¤¤¤¤¤¤¤¤¤¤¤¤¤|
+――――――――――――――+

Mouseover:

+――――――――――――――+
|¤¤ __¤¤¤¤¤¤¤¤¤|
|¤/?   ?\¤¤¤¤¤¤¤|
||      |¤¤¤¤¤¤|
|¤?\___/?¤¤¤¤¤¤¤|
|¤¤¤¤¤¤¤¤¤¤¤¤¤¤|
+――――――――――――――+