How to reproduce:
1. Open the attached UnityRemote_746345.zip project
2. Open the Sample Scene
3. Go to Menu bar-> Edit-> Project Settings-> Editor-> Device-> Chose Any iOS/Android Device
4. Download Unity Remote 5 to your mobile phone and open the app
5. Connect your mobile device with a USB cable to your computer
6. Enter the Play mode in the Unity Editor
7. Tilt the device to rotate the cube
8. Disconnect the device or Stop the Play Mode
9. Let the device idle
10. Press Play again

Actual: The cube is rotating at the same speed as the last time as the application run until the Unity Remote gets connected again
(See the attached Repro_746345.mp4 video in the Edit section)

Reproducible with: 2017.4.34f1, 2020.1.0a14

Reproducible with:
VLNQA00125 Google Pixel 2 8.1.0 Snapdragon 835 MSM8998 Adreno (TM) 540 OpenGL ES 3.2 FA7BB1A08116
iPhone X (iOS 13.0)
iPhone 7 (iOS 11.0)