My main camera and AR camera returns to origin when in play mode in unity

When I go into play mode the Vuforia AR camera and main camera (which ever is the primary camera at the time) move back to origin and the main camera has scripts from the AR camera applied to it automatically.

• video Background Behaviour script & Default initialisation error handler internal script

Also all assets disappear when unity is in play mode and when i introduce a new camera and go into play mode it is tagged as "main camera" but when i leave play mode it goes back to "untagged"

This is getting frustrating my only option is to uninstall and reinstall unity, please help before it comes to that.