has now been assigned and escalated internally.
You can follow the issue here
https://issuetracker.google.com/issues/291989158
and report more cases you see in feedback https://support.google.com/mail/answer/9212652
Looks like it's no longer supporting background images. Hope it's a bug that gets fixed soon, just a few billion emails breaking currently.
https://parcel.io/blog/gmail-and-background-images
has now been assigned and escalated internally.
You can follow the issue here
https://issuetracker.google.com/issues/291989158
and report more cases you see in feedback https://support.google.com/mail/answer/9212652