To reproduce

1. Open the scene "TriggerTest".
2. Press play and pause the game immediately.
4. Press the advance frame button until the frame where the sphere is intersecting the cube. Notice OnTriggerEnter has not been called.
5. Press the advance frame again and notice it now says "enter" in the console.
6. Continue advancing the frame until the sphere exits the cube. Notice OnTriggerExit has not been called.
7. Advance the frame again and notice it now says "exit" even though the sphere stopped intersecting the cube on the previous frame.

Expected result: 'OnTriggerEnter' is calles as soon as the sphere enters the cube

Actual result: 'OnTriggerEnter' is called on frame later than the collision occurs.