Thumbnails really small

CMS Version

4.4.0 - docker release

Player Type

Android app on Fire Sticks

Issue

When we look at the content that is in the media library, we are not seeing a full size thumbnail of the content and just a tiny 120x67 preview (see below)

Is this something we have set wrong somewhere or a bug? It seems to be the same with any type of image or video.

Thanks in advance