Repro steps:
1. Open scene1 from the attached (empty) project, or open any other project.
2. In the editor, press Ctrl + P (play) followed immediately by Ctrl + Shift + P (pause)
3. Once the game starts in a paused state, click the next frame button to advance one frame. Observe the console errors.

Notes:
- Regression introduced in the early 2017.2 (repros in b2, probably even earlier)
- Does not repro if the next frame is advanced via the keyboard (i.e. Ctrl + Alt + P)
- Does not repro if the game is paused and started via the editor buttons.
- Gif attached with the repro steps.