Pause and resume Ad will cut off ads

[maxTanquerel]

[REQUIRED] Issue description

When an ad is paused, then resumed, we can see the "Learn more" disappear, then the countdown will jump, second ad will not be playing entirely (sometime entire ad is skip to third one)

Video of issue : https://drive.google.com/open?id=1mvmjUpsvU57IXo4Duht4NHOLYhkjo0QF

[REQUIRED] Reproduction steps

I am able to reproduce this issue in the exoplayer - demo ima project, branch release-v2. The only thing I changed is ad and content url + line 351 of PlayerView.java boolean controllerHideDuringAds = true; to boolean controllerHideDuringAds = false;

[REQUIRED] Link to test content

adTag = "https://pubads.g.doubleclick.net/gampad/ads?sz=640x480&iu=/124319096/external/ad_rule_samples&ciu_szs=300x250&ad_rule=1&impl=s&gdfp_req=1&env=vp&output=vmap&unviewed_position_start=1&cust_params=deployment%3Ddevsite%26sample_ar%3Dpremidpostpod&cmsid=496&vid=short_onecue&correlator="

content = "https://www.rmp-streaming.com/media/bbb-360p.mp4"

[REQUIRED] A full bug report captured from the device

[Logs.txt]
(https://github.com/google/ExoPlayer/files/3287131/Ads.Paused.error.Logs.txt)

[REQUIRED] Version of ExoPlayer being used

exoplayer : release-v2 branch, latest commit : ecb7b87
ima : 3.11.2

[REQUIRED] Device(s) and version(s) of Android being used

Pixel 2

[maxTanquerel]

Any news on this ?

[andrewlewis]

Given "AdError 402: VAST media file loading reached a timeout of 8 seconds.", I think this might be a duplicate of #4140. We are in the process of upgrading to new ads manager implements that should fix this problem.

[andrewlewis]

I've verified this is fixed by migrating to the new IMA SDK preloading APIs (fa7d26d), and that change should be in a release soon.