# Dark mode issue in Developer Canary Program Instances? **URL:** \ **Category:** Confluence Cloud\ **Tags:** dark-mode, design-tokens\ **Created:** [November 10, 2023, 10:37am UTC](https://community.developer.atlassian.com/t/dark-mode-issue-in-developer-canary-program-instances/74600 "2023-11-10T10:37:36Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![ajay](https://sea1.discourse-cdn.com/atlassiandeveloper/user_avatar/community.developer.atlassian.com/ajay/32/53765_2.png) [@ajay](https://community.developer.atlassian.com/u/ajay)\ **Post date:** [November 10, 2023, 10:37am UTC](https://community.developer.atlassian.com/t/dark-mode-issue-in-developer-canary-program-instances/74600/1 "2023-11-10T10:37:36Z")
Some of our test instances are enrolled in the Developer Canary Program, where we’re encountering problems with the Dark mode theme. However, these issues aren’t present in our non-Canary cloud instances, where toggling between Dark and Normal modes for the App is functioning correctly. Has anyone else noticed similar issues? I have created a ecosystem ticket - [ECOHELP-30036](https://ecosystem.atlassian.net/servicedesk/customer/portal/34/ECOHELP-30036) ---
**Author:** ![ajay](https://sea1.discourse-cdn.com/atlassiandeveloper/user_avatar/community.developer.atlassian.com/ajay/32/53765_2.png) [@ajay](https://community.developer.atlassian.com/u/ajay)\ **Post date:** [November 17, 2023, 4:12am UTC](https://community.developer.atlassian.com/t/dark-mode-issue-in-developer-canary-program-instances/74600/2 "2023-11-17T04:12:34Z")
The ticket has been updated with the below comment identified as the root cause. > Before our change, the CSS was being loaded as JavaScript, but after the change it is being loaded as a CSS file. This broke the CORS policy (which is what I saw above) and caused the error. We’ve turned off the Feature Flag causing this issue and the engineering team will go back to the drawing board to fix this.