Bug: Image Hotspots squashed in Interactive Book (Lumi Cloud)

Images in Image Hotspots (specifically a 2:1 ratio image) are being squashed into a square shape when viewed inside an Interactive Book on Lumi Cloud. This distortion is visible in the editor's "View" tab. The user is using Chrome. [REF-IMAGE:0] shows the warehouse scene image vertically stretched/horizontally squashed.