I figured out what is happening. In the previous version of plugin we had, v2.4.6
the Recent Posts block generated code for a specific category like this:
{"postView":"list","category":"84717"}
and in the version we updated to back in late September of 2021 v.2.10.3
the block generated this code for a specific category:
{"postView":"list","categories":[{"id":"84717","name":"Press Releases"}]}
We hadn’t updated the page that this block appeared on until April 5th of this year, when the new attribute structure got rendered and Gatsby didn’t know what to do with it.
We’ll update the plugin and the Gatsby component to parse the newer format.
Thanks!