I apologize for the spam, I was able to determine the cause... found a message in logs that suggested it was an AWS credential issue. Log messages stopped after fixing this.
2020-03-25 15:52:12.362+0000 [id=35] WARNING c.a.p.p.c.CredentialsLegacyConfigLocationProvider#getLocation: Found the legacy config profiles file at [/var/lib/jenkins/.aws/config]. Please move it to the latest default location [~/.aws/credentials]. -- You received this message because you are subscribed to the Google Groups "Jenkins Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to jenkinsci-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/jenkinsci-users/f3df3df2-9391-40e8-a157-9fefc7dc4da9%40googlegroups.com.