Topic excerpt tiles are not displaying properly after updating to Confluence 9.2.0 and using Viewport version 2.23.2

Steps to reproduce:

1. Create a space with a Viewport, set the theme to a copy of the Help Center theme and edit that theme:

• change spaceHomePage.topicType to tiles (default: accordion)
  spaceHomePage.topicType=tiles

1. Create a page with an Excerpt that has text or an image in its content

2. Open the space home page in viewport

Expected result:
The Topic section lists the page showing the title and excerpt:

Actual result:
The Topic section lists empty placeholder graphics but no title or excerpt of the pages.