To reproduce:

1. Download and open attached "VideoIssue.zip" project.
2. Build and run on any android device.
3. When application opens, press "Play" button and instantly after that press Device home button.
4. After application goes into background, reopen it.

Expected result: After reopening the application, video continues playback from the point where application was quit.
Actual result: After reopening the application, video is not playing and "Play" is not interactable. Interaction activates only when app is reopened one more time.

Reproduced with: 2018.1.0b1, 2017.3.0f3, 2017.2.1p1, 2017.1.2p4, 5.6.5f1, 5.5.6f1.

Devices under test:

Samsung SM G920F (Galaxy S6)*, OS:7.0, CPU:arm64-v8a, GPU:Mali-T760,
Build:samsung/zerofltexx/zeroflte:7.0/NRD90M/G920FXXS5EQFD:user/release-keys

Sony D6603 (Xperia Z3)*, OS:6.0.1, CPU:armeabi-v7a, GPU:Adreno (TM) 330,
Build:Sony/D6603/D6603:6.0.1/23.5.A.1.291/2769308465:user/release-keys

Samsung GT I8190*, OS:4.1.2, CPU:armeabi-v7a, GPU:Mali-400 MP,
Build:samsung/goldenxx/golden:4.1.2/JZO54K/I8190XXAMG4:user/release-keys

Notes: Issue also on appears on iOS devices. It appears that at runtime, OnApplicationPause call does not happen after calling Handheld.PlayFullScreenMovie if Home Button is pressed before video playback begins therefore resulting in video not playing after app is reopened.