Your data element needs to be called from somewhere, such as a rule or extension, in order to output the message. This is why you don't see anything automatically when you load a page even though there is nothing syntactically wrong with your code. As this guide explains, a data element's value will attempt to be reset any time it is called: https://jimalytics.com/tag-management/adobe-launch-data-elements-guide/ Also, If you must to log messages to the console, it is recommended to always use th...

Have you tried breaking the session refresh down by browser? I've seen high numbers for cross domain tracking on Safari browsers (ITP and blocking of cookies, especially 3rd party and cross domain) as they tend to delete the mcvid when a user goes from domain A to B. The best way to debug it, is to extract data from the data feed and then follow one of the transaction ids that has session refresh and see on which page the marketing channel was set to session refresh. You could look into this art...