Hey @john_martin what oneagent version were you upgrading to? I know there were a few issues with the most recent upgrade that @larry_roberts pointed out: https://community.dynatrace.com/t5/Dynatrace-Open-Q-A/Latest-OneAgent-Possible-bug/td-p/170449
What did support conclude?
What kind of container runtime are you using? We faced an issue in detecting Docker engine from OneAgent 1.219 I believe. Dynatrace support found a bug and it's going to be resolved by OneAgent 1.227.
You will need to provide more information or talk to support to get this resolved.