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[Android] Slower response to movement when magnification feature is enabled



How to reproduce:
1. Open Unity project, attached by a tester
2. Build and run on a device with triple tap zoom function
3. While building, enable triple tap zoom on a device
4. On the launched app, try to move cube by touching screen

Expected result: Visible movement right after touching screen (works when magnification feature is turned off).
Actual result: Slow, poorly visible movement after touching screen.

Reproduced with: 2018.3.0b1, 2018.2.8f1, 2018.4.11f1, 2017.2.3p4.

Devices under testing:
Reproduced on:
VLNQA00089, Samsung Galaxy Note 10.1 2014 Edition (SM-P600), 5.1.1, CPU: Exynos 5 Octa 5420, GPU: Mali-T628
VLNQA00110, Samsung Galaxy Note2 (GT-N7100), 4.4.2, CPU: Exynos 4 Quad 4412, GPU: Mali-400 MP
VLNQA00087, Sony Xperia Z2 Tablet (SGP511), 6.0.1, CPU: Snapdragon 801 MSM8974PRO-AB, GPU: Adreno (TM) 330
VLNQA00022, Xiaomi Redmi Note 3 (Redmi Note 3), 5.1.1, CPU: Snapdragon 617 MSM8952, GPU: Adreno (TM) 510
VLNQA00054, Xiaomi MI 3W (MI 4LTE), 6.0.1, CPU: Snapdragon 801 MSM8974AC, GPU: Adreno (TM) 330

Doesn't reproduce on:
devices without triple tap zoom ability,
iOS devices (don't have this functionality).

  1. Resolution Note:

    The official documentation says "After you turn on magnification, single taps take slightly longer. This short delay lets your device find out if your tap is part of a triple-tap.".

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