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[BUG] Video Pauses Every Time You Try to Play It on IOS (CapacitorCookies + Datadog Integration Issue)

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#2,190 10 comments 5 reactions 0 assignees View on GitHub

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
38/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Quiet
Tech stack
html, ios, javascript
Domain
mobile-dev, web-dev

Research direction

Start by reproducing the issue with the Datadog RUM init shown in the report, CapacitorCookies enabled in capacitor.config.json, and the supplied video element on an iOS device or emulator. Compare automatic tracking with the documented temporary workarounds, and consider the issue done when video playback remains uninterrupted with cookies and automatic tracking enabled.

Written by the indexing model from the issue text.

Description

needs reproduction platform: ios

Description:

When using Datadog's automatic tracking with CapacitorCookies: { enabled: true } in a Capacitor app on iOS, video playback for video tags is interrupted or fails to function properly. This issue affects all video elements and any libraries that use them under the hood.

Through testing, it was identified that Datadog’s automatic tracking of user interactions (e.g., route changes, button clicks) conflicts with video playback on iOS. Disabling CapacitorCookies or setting trackViewsManually in Datadog can resolve the issue temporarily, but the underlying cause seems related to how Capacitor handles cookies in combination with Datadog’s tracking.

Environment:

IOS device/emulator 17.5 ( any version bug is reproducable )

Plugin

CapacitorCookies with capacitor 6.0.0( any version bug is reproducable )

Step to reproduce

1)Initialize a Capacitor iOS app with the following configuration:


datadogRum.init({
  trackViewsManually: false,
  ...
});

2)Enable CapacitorCookies in capacitor.config.json:

{
  "CapacitorCookies": {
    "enabled": true
  }
}

3)Add a video tag to any component or page:

<video controls width="300">
  <source src="https://commondatastorage.googleapis.com/gtv-videos-bucket/sample/BigBuckBunny.mp4" type="video/mp4" />
  Sorry, your browser doesn't support embedded videos.
</video>

4)Run the app on an iOS device/emulator and attempt to play the video.

Expected Behavior:
The video should play without any interruptions or issues.

https://github.com/user-attachments/assets/35e85295-2ec7-4676-96f2-7cc4e3b24d48

Actual Behavior:
The video fails to play or stops unexpectedly.

https://github.com/user-attachments/assets/1300d3d9-e8d8-4e0d-907f-5cc2b7d66398

Minimal reproducible example (please use your own Datadog credentials)

https://github.com/bulletbrand/safe-area-demo-repo

Dominant language
Java
Stars
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Forks
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Avg merge
5d 11h
Merged PRs (30d)
3

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  4. Open a pull request that references the issue number.

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