I've experienced this a few times, primarily on what I assume would be considered a 'jumbo' VM - 500+GB disk. It happened to creep up again during our last maintenance which brought be back to looking through everything.
Originally, I had made the change based on the below article, specifically the 'cs-PublishImageTimeoutMins' setting and this seemed to resolve things. It does look like the article was updated this month (JAN 2023).
https://kb.vmware.com/s/article/75019 < "UNKNOWN_FAULT_FATAL - After waiting for 300 seconds internal template VM Instant Clone Creation Error (76469)"
One thing that I did happen to notice a few months ago was restarting the Connection Server(s) happened to kick-things. Before I found the article was updated to reflect another ADAM DB change to vCenter, I restarted the Connection Servers in my environment and then attempted to re-publish the image. It was successful...
