Viewport Tab Macro doesn't support image enlargement in second tab

Images in Viewport tabs don't enlarge in the Viewport tab macro when clicked on tabs other than the first tab.

Steps to reproduce

• Edit a page and create Viewport tab macros inside a Viewport tab container macro.

• Add an images to the second tab macro.

• View the page in a Viewport site that is using the Help Center Theme.

• Select the second tab and click on the image.

Expected result

• Image expands to fullscreen.

Actual Result

• Clicking the image doesn't result in any UI change.