Zoom in mermaid diagram not working after changing theme

[george-gca]

Describe the bug
When seeing a diagram with zoom support, the zoom stops working after changing theme inside blog post. This is a known issue as a result of #1992.

To Reproduce

1. Create a blog post with support for zoom in diagrams based on the example post
2. Check that the zoom is working
3. Change theme and test it again

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.