Cannot get date math to work properly in Elasticsearch

Thanks for your reply. I'm running 7.1.0. I've fixed the search request above, looks like it was a copy/paste error.

Since I have customer PII data, I can't share a full document. I guess my question may be more theoretical - should this query above work correctly when date format is strict_date_time? Are there any known issues or limitations here?

What would be my next level to debug why the date time search using now isn't providing accurate results? Thanks.