Earlier this month, we reported an issue with both Chrome Beta and Dev on Nougat. Despite both apps being installed on your phone, they didn't show up in the list of My apps & games in the Play Store, which meant that they were never automatically updated and you had to manually search for them, open their listing, and then see if an update was available or not to download it.

The issue, as we rightfully suspected, was related to the change of the signature keys in Chrome. As Googler Alexander Mineer explained to us in the comments on the original post, the keys had to be changed due to Chrome's new ability to act as a WebView provider in Nougat.