XF 1.5 Avatars not displaying as expected



Firstly, apologies if this has been posted elsewhere on the forum and I've missed it -- I did have a search before making this post but unfortunately it yielded no results.

I'm having a slight issue on my forum where avatars don't display as expected on the member card. It only happens when avatars are uploaded that aren't square. I've attached some pictures below that show my problem -- is there any way it's possible for me to add something to a template file to resolve this? Or if it's just a misconfiguration somewhere? I've had a look around but don't see anything.

Screen Shot 2017-01-11 at 01.16.27.png Screen Shot 2017-01-11 at 01.16.12.png