I created an email a basic template in Mailchimp, made a few tweaks and implemented the template on our platform. There's (of course) issues with outlook and fonts, but - more surprisingly - I have an issue with image download in Gmail:

In Gmail, when images aren't automatically downloaded, the email layout looks fine before accepting images, but after downloading them the layout is messed up: table widths aren't applied and also cell background colours are not in place. Please see screenshots below.

before download

after downloading

automated download

Anybody has experienced this before? Any clues as to why this might happen?