Whenever I try to export a map with the Google Maps plugin in the background, it exports but just exports to a blank document. When I turn the Plugin off so it is not in the background, it prints fine. Why is this?
I gave up using the OpenLayers plugin a long time ago and tried to use other services like WMS whenever possible because of the multitude of quirks with offsets, printing etc.
For some time, there is the QuickMapServices plugin around, which so far works great. You can work there with any projection you like, and printing works, too (Never tried with PDF, cause I do not need them)
After installing it, go to Web->QuickmapServices->Settings->Contributed services and click "Get contributed pack" to get more than the default list of services.