Kickstart loooonnnggg delay "Probing storage..."

I have several kickstarts for various server roles. One has started giving me very long (like ten minutes!) delay on the "Installation Summary" screen. "Installation Source" has a yellow exclamation and "Probing storage..." and "Software Selection has a yellow exclamation and "Downloading package metadata" After a long time, it moves forward. I'm not seeing anything in the logs, either in / or /mnt/sysimage After it gets going again, all is well.

I've looked at this kickstart and a working one side-by-side, and I'm just not seeing anything. Everything about storage and package sources is identical. %packages and %post are different, as it network config, but I can't see how that could explain this.

I can't post the kickstarts as the network in question is not connected to the Internet. Looking for any ideas about other logs to check, experiments to try, etc.