Photodeck publishing plugin fails

I'm not sure if this applies to any other publishing plugins as well, or if it's limited to the Photodeck plugin...

If I create a collection with a lot of images (in excess of 80 for example), and publish them, Lightroom 13 (and 13.01) gets so far and fails with the following pop-up error message:

Can't update this collection.

An internal error has occurred:
postMultipart: chunk must contain either value or filePath

Plugin worked fine in Lightroom Classic 12.5.

It seems to be random, but consistent - if that makes sense..

I tried uploading a gallery with over 100 images and I received this error after only 92 images had uploaded. If I tried to republish, no new photos would upload and the 'New Photos Waiting to Publish' didn't change - LR just refused to upload the rest of the images.

I tried it with a collection of 98 images, and it produced the error after 62 images had uploaded..  So I deleted the gallery, tried to republish the same 98 images in a new collection, and it still created the error at 62 images..  So to rule out the image, I tried creating a new collection with 94 images - omitting images 63-66 to see if it would go past them, if they were causing the issue.

It then only uploaded 60 images, failing at the SECOND image BEFORE it got last time (ie: image 60 instead of 62) - so it's not because of the image content/metadata as images 60 and 61 uploaded succesfully before.

So I tried creating a new collection and removed images 60 and 61, as well as 63-66 - and this time the error popped up at image 50...  

Anyone else having trouble with publishing plugins, specifically Photodeck?