“Token Not Submitted” issue caused by page caching

For anyone encountering rejections of form submissions during WPBruiser test mode with the reject reason “Token Not Submitted”: if you are using a caching plugin, it’s most likely the root cause.

The solution is to exclude your form’s page from your caching plugin.

Some caching plugins do not cache for logged in admin users, in which case your form submissions would work as long as you are logged in, but not in an anonymous browser window.

This issue has been brought up a few times in this thread, but those discussions are already closed, which is why I had to start a new one.