Security headers disappear on WordPress pages

*The below only temporarily solves the issues. I ran into the missing header issues was a new cache file was generated.

I use several of the plugins you mentioned and recently noticed the same issue which drove me crazy as I manually confirmed that all of the headers were present in the correct files. I was able to resolve the issue by deleting my cache in WP Super Cache and confirmed that everything was back to working as expected by running a followup scan on SecurityHeaders.

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