FYI: Microsoft Outlook’s Link Preview feature relies on cached information from Bing, which can appear as an error to recipients of OJS notifications that include the Current Issue URL /issue/current – most frequently, as a part of the New Issue Notification.
If the email recipient’s Link Preview feature is turned on, whenever Outlook detects a URL in an email message, it will automatically provide a little “preview” box. However, instead of fetching a live version of the website to display in the “preview” box, Outlook is using a cached version, from the last time Bing crawled the site.
The preview is almost always an out-dated version of the Current Issue URL, displaying metadata from a past issue. Even if Bing crawls the journal site very frequently, it is very unlikely that the /issue/current URL will update quickly enough.
I’m not sure if this is within scope for PKP, but it might be helpful for journal managers & hosting folks to know, in case anyone else receives these reports from end-users.