Featured Images disappear randomly using Pods framework with Virtue 4.9.31

I’m currently building a database for a theatre using the Pods framework and Virtue Pro theme. I’ve created two new custom post types in Pods (productions and artists) which have multiple relationships (productions have functions/credits, e.g. director, choreographer, etc; artists get 2-way links to “production credits”, thereby building a history of all of the productions that they participated in ). I use the built in Virtue Portfolio post type (a Kadence developed CPT with some nice features that’s built into the theme) to build a grid of seasons, with a Pods shortcode to build the list of productions on each portfolio page.

The portfolio and pods CPT’s all use featured images so I can display thumbnails for both the portfilio grid, and for pods-template listings. I’m still fairly early in the development and the system exists only on my localhost, which is MAMP Pro running: WordPress 5.6, PHP 7.3.3 under Apache amd Kadence Virtue Theme 4.9.31 with a child theme. This is the latest Kadence release and is only a couple of weeks old.

So far, I’ve noticed two featured images have disappeared from the localhost site. One was on an Artist CPT post that pods created, the other was associated with a Virtue Portfolio post. The featured images are still in the upload directory, but the attachment link in the wp_posts table seems to be gone. They don’t show up in the Media Library either, though static links in page HTML still work.

Any thoughts? I’m posting the same issue with Kadence….