Image not rendering from external URL on PBI.com

We're utilizing an external URL to provide images for display within a table visual in a Power BI dashboard. This works fine on a desktop PBIX--however, when publishing to PBI.com, the image URLs do not render.

Sample URL: https://ws-na.amazon-adsystem.com/widgets/q?_encoding=UTF8&MarketPlace=US&ASIN=B078GD3DRG&ServiceVersion=20070822&ID=AsinImage&WS=1&Format=SL500

Is there some way to whitelist the domain in question to allow for URL rendering?