IOS force feedback strength does not increase

Force feedback does not strengthen when expected on IOS.
It stays the same regardless of where the pawn is on either the red or yellow squares.

Tested on 9753_iPhone 7+ 12.0.1 and 16021_iPhone XS Max 12.0

This does not reproduce on Android.

1. Open QAGame
2. Edit > Project Settings
3. Select Maps & Modes in the left panel
4. Set Game Default Map to TM-Gameplay
5. File > Package Project > IOS
6. Install app to device
7. Walk up to the area under the Force Feedback text
8. Walk onto the yellow rectangle
9. Walk onto the red square

Result: Vibration strength does not change and remains the same on the red square
Expected Result: The vibration will be stronger as the player walks closer to the red square