To reproduce:
1. Open QA attached project
2. Build it to android device
3. Rotate the device screen horizontally and vertically
4. Notice that on horizontal rotation the game window does not scale correctly

Actual result: The UI scale is stretched on horizontal view
Expected result: The UI should be scaled normally, not stretched

Reproduced with:2018.3.7f1; 2018.3.12.f1;2019.1.0b10; 2019.2.0a10
Not reproducible with: 2018.3.6f1

Reproducible with the wrong position:
VLNQA00047, Samsung Galaxy Tab3 Lite 7.0 (SM-T113), Android 4.4.4, CPU: Spreadtrum SC7730S, GPU: Mali-400 MP
Overlaps:
VLNQA00257, Sony Xperia XZ Premium (G8141), Android 8.0.0, CPU: Snapdragon 835 MSM8998, GPU: Adreno (TM) 540
Stretches:
VLNQA00027, Xiaomi MI MAX (MI MAX), Android 7.0, CPU: Snapdragon 617 MSM8952, GPU: Adreno (TM) 510
VLNQA00261, Samsung Galaxy S10+ (SM-G975U), Android 9, CPU: Snapdragon 855 SM8150, GPU: Adreno (TM) 640
VLNQA00013, Samsung Galaxy S6 Edge+ (SM-G928F), Android 7.0, CPU: Exynos 7 Octa 7420, GPU: Mali-T760

Note: added images and logcat.
Note: attaching project