Hmmmmm sounds strange.
If it’s happening randomly thats even more confusing.
I am wondering if it may have something to do with the print buffer.
Maybe there is not enough memory in the printer if these are very large spool files.
You said it was a remote CA printer.
Maybe there are some connections issues with a noisy signal or lack of bandwidth.
The only other thing would be to try a different printer and see if you get same results.