Pixieset plug in issue with LRC

I’m having an issue with the Pixieset Lightroom Classic plugin and need help recovering my published photo associations.

My normal workflow is to use separate Lightroom Classic catalogs for different clients. From each catalog, I go to Publish Services → Pixieset, create/select the appropriate Pixieset collection and Highlights set, drag photos from my Lightroom Library into the set, and publish them.

Until recently, when I opened one of my Lightroom catalogs and accessed Pixieset under Publish Services, my existing Pixieset collections would appear with the photos already associated with their corresponding sets.

Something changed yesterday. Now the collection names and Highlights sets still appear in Lightroom, but they show 0 photos. The actual photos and galleries are still completely intact and visible on my Pixieset account.

The behavior is also catalog-dependent: when I open a catalog containing the photos originally associated with a particular collection, those photos can still appear in that collection. When I switch to another catalog, the collection structure is still there but the photos show as 0.

I have confirmed:

• The Pixieset plugin is installed, enabled, and running.
• Plugin version: 1.0.4.0.
• The plugin is still logged into my Pixieset account.
• I tried Pixieset Sync → Sync Now, but it did not restore the missing photo associations.
• I have NOT deleted the Pixieset Publish Service or collections.
• I have NOT republished the galleries.
• The actual Pixieset galleries/photos are still intact online.

I also use multiple Lightroom catalogs, so I do not want to combine catalogs or rebuild the galleries from scratch if there is a way to restore the previous Publish Service associations.

Is a way to recover the Lightroom Publish Service/photo associations or restore the previous Pixieset plugin state without deleting or republishing my existing Pixieset galleries?