Win 10, GTX 1080
Blender 2.80; 2019-01-07 23:37, 91a155833e59
Open attached file. Viewport should be set to camera view. Camera has two keyframes. Switch to Eeevee. Select the camera object (should already be selected). Grab and move camera ("g"). Press left mouse button to confirm. Position of the camera resets back to its keyframed location. If you go out of the camera view, you can change the location.