Issue Summary

GIFs uploaded to issues via REST API are displayed in Jira as static images.Customer are experiencing an issue with GIF attachments. Specifically, GIF attachments our app uploads to Jira via REST API are displayed as static images. However, when the same GIF attachments are uploaded directly through the Jira Cloud UI, they are displayed correctly (animated).

• In Jira Cloud, GIF images uploaded via POST {{jira_url/rest/api/api-version/issue/issue-id-or-key/attachments}} are displayed statically as JPG or JPEG files.

• The thumbnail link received in the API response points to the correct, animated GIF file.

• Despite the incorrect display in the Jira Cloud UI, the actual file downloaded to the user's computer is the correctly animated GIF.

• The issue was tested using both REST API v3 and v2, and the result was the same.

• The issue is reproducible only on Jira Cloud.

• On Jira Data Center (v9.16.0), the functionality works as expected.

Steps to Reproduce

1. Upload a GIF attachment to a Jira issue via REST API.
2. Observe that the GIF is displayed as a static image in the Jira Cloud UI.
3. Download the attachment and verify that it is animated.

View this screen recording below to see the problem

Postman_xWcbA7WpCm.mp4

Expected Results

GIF attachments uploaded via REST API should be displayed as animated images in the Jira Cloud UI.

Actual Results

GIF attachments are displayed as static images in the Jira Cloud UI. 

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available