There is currently an issue where a portion of images/static resources are missing from tiles and widgets are missing images. This is a known issue that was discovered the evening of the migration, with not all static resources copying over to AWS correctly. Attachments, images, etc. are not affected by this issue. Engineering is currently working on a solution to this problem. We will provide updates on how to resolve this problem on this thread.
For reference tracking, the ID for this issue is: CLOUD-7757. Engineering has identified the core problem, and is actively working on a solution to be deployed as an emergency release.