OK, so in case anyone else is having a problem with MS Onedrive while using the Ghostery extension: In Gostery > Settngs > Blocking Options > Beacons turn off 'Optimizely' and that does the trick.
I just poked Ghostery on Twitter to see if they have herd about it, they might add a fix to Ghostery
I just looked at the OneDrive site and I see Optimizely is the only thing Ghostery lists