Steps to reproduce:

1) Download attached project 'Unity_Sample_Application.zip' and open in Unity
2) Open Services window
3) Set organization and enable Ads
4) Build and run project on a device
5) Click on 'Play Ad' button, you'll see a video ads
6) Close the ads view after the video finished, and you will see that there is no reward popup

Expected result: There should be a reward popup after ads view is closed

Actual result: There is no reward popup after ads view is closed

Device under test:
Google Pixel C, OS:7.1.1, CPU:arm64-v8a, GPU:NVIDIA Tegra, Build:google/ryu/dragon:6.0.1/MXB48J/2452629:user/release-keys

Samsung SM G925F (Galaxy S6 Edge), OS:6.0.1, CPU:arm64-v8a, GPU:Mali-T760, Build:samsung/zeroltexx/zerolte:6.0.1/MMB29K/G925FXXU5DQA7:user/release-keys

Reproduced with:
Version 2017.2.0a1 (eda3a4e19895)
Tue, 16 May 2017 21:14:26 GMT
Branch: trunk

Not reproduced with:
5.6.1p1, 2017.1.0b6

Regression since:
Version 2017.2.0a1 (eda3a4e19895)
Tue, 16 May 2017 21:14:26 GMT
Branch: trunk