Embedded Pages having a bug on certain instances it doesn't show Dark Mode

Issue Summary

Embedded Pages having a bug on certain instances it doesn't show Dark Mode.

This is reproducible on Data Center: (yes) / (no)

Steps to Reproduce

1. Change the Jira theme to Dark Mode.
2. Open any EP page 
3. You will see the Jira is in Dark Mode but EP is in Light mode

Expected Results

Actual Results

Workaround

 No workaround as of now.