How to reproduce:
1. Open the attached project
2. Build and run Main scene on device (press autorotation button and enable all orientations)
3. Make sure OS auto-rotation is enabled
4. Hold device as Landscape Left
5. Disable OS auto-rotation
6. Press Landscape Right (it will force this orientation)
Result: it will not rotate to Landscape Right.
This issue can be reproduced holding device any orientation. It will not rotate to the opposite orientation than the one device was held when disabling OS auto-rotation

Note: Mostly all devices don't rotate to Portrait Upside Down when OS auto-rotation is disabled and it doesn't matter how device was held when OS auto-rotation was disabled.

Reproducible: 2019.1.0a13, 2018.3.1f1, 2017.4.12f1

Tested and reproduced:
VLNQA00176, Xiaomi Redmi 4 (Redmi 4), Android 6.0.1, CPU: Snapdragon 430 MSM8937, GPU: Adreno (TM) 505
VLNQA00122, Samsung Galaxy S9 (SM-G960F), Android 8.0.0, CPU: Exynos 9 Series 9810, GPU: Mali-G72

Tested and didn't reproduce:
VLNQA00123, Google Pixel 2 XL (Pixel 2 XL), Android 9, CPU: Snapdragon 835 MSM8998, GPU: Adreno (TM) 540
VLNQA00155, Meizu PRO 7 Plus (PRO 7 Plus), Android 7.0, CPU: MediaTek Helio X30 MT6799, GPU: PowerVR Rogue Marlowe
VLNQA00223, Samsung Galaxy S4 (GT-I9505), Android 5.0.1, CPU: Snapdragon S4 Plus MSM8960, GPU: Adreno (TM) 320
VLNQA00036, Motorola Moto G (1st Gen) (XT1032), Android 5.1, CPU: Snapdragon 400 MSM8226, GPU: Adreno (TM) 305