The Telegram iOS app plays videos with stereo audio as mono, with the left and right channels being identical. The same video plays correctly in stereo in Telegram Web and after being saved to the device and played in another player.
The issue is reproducible with both wired and Bluetooth headphones. It has also been reproduced on iPad Air (6th gen) and previously on iPhone 14 Pro Max. Reinstalling the app does not resolve the issue, and a third-party iOS Telegram client shows the same behavior.
Steps to reproduce
Open the Telegram iOS app and go to any chat or channel containing a video with stereo audio.
Connect headphones, either wired or Bluetooth, and play the video in the app.
Listen to the left and right audio channels: both channels play identical audio.
For comparison, play the same video in Telegram Web, or save it to Photos and play it there.
Current result
The video audio is played as mono in the Telegram iOS app: the left and right channels are identical.
Expected result
The video should play with its original stereo audio, with distinct left and right channels, as it does in Telegram Web and when the saved video file is played in another player.
Can you please provide a video from any other device showing that the audio is not working in stereo mode? The sound is different from both speaker in all our testing. Or maybe a comparison between the video saved in the Photos app and the Telegram Player
https://t.me/anze12days/3