Incorrect Title and Navigation Display after upgrade to 4.15.0

Hi All, I just upgraded to 4.15.0, had a permissions issue during the auto upgrade, whcih we fixed and reran, but it seems to have had an issue when doing the upgrade because after the upgrade some of the Navigation Headings, Dashboard heading, column headings etc are displaying incorreclty, for example on our General Multi Site Summary the Widget heading displays as :General_AllWebsitesDashboard General_TotalVisitsPageviewsActionsRevenue

The Navigation for this Page (Top of Screen) instead of showing “General Multi Site Summary” shows :General_MultiSiteSummary.

This is repeated through out the site. Anyone had this issue or have any ideas about how to resolve?

I cleared out the tmp folder after the install and restarted the apache service but this made no difference.