Hi @mike.s,
Welcome to the Duo Community, and thanks for asking your question here! This type of error will typically only display on the Duo Prompt/login page. Since the time falling out of sync is usually due to not being able to catalog the logging properly due to timestamp ordering, it isn’t able to log the event properly.
P.S. If you or anyone reading needs to resolve this issue, please check out our help article on how to do so here: Knowledge Base | Duo Security