Texture wrap mode set to "Mirror Once" is mirroring more than once on:
Android GLES3 player (Samsung Galaxy S7, Nexus 6)
Android Vulkan player (Samsung Galaxy S7)
WebGL player

Steps:
1. Change the Texture wrap mode to "Mirror Once" on the texture import settings of a texture OR use the repro project
2. Build Android apk and run on phone OR Build WebGL player
3. Observe

Actual and Expected results please refer to attached picture.

Reproducible in : 2017.1.0b5, 2017.1.0b1 (New wrap modes are new in 2017.1)