How to reproduce:
1. Open the attached "Sound.zip" project
2. Open the Build Settings window (File → Build Settings)
3. Add the "SampleScene" to the Open Scenes list (“Add Open Scenes” Button)
4. Build and Run the Project on Android
5. Turn up the “Media” Sound on the used device
6. Press the “Play Sound” Button in the Player

Expected result: An Audio Clip is played without issues
Actual result: The Audio Clip is played but there are audible glitches heard

Reproducible with: 2021.3.31f1

Reproducible with these devices:
Vivo X20, CPU: Qualcomm SDM660 Snapdragon 660, GPU: Adreno 512 (User reported)
Vivo X9i, CPU: Qualcomm Snapdragon 625 MSM8953, GPU: Adreno 506 (User reported)

Not reproducible with these devices:
VLNQA00026, Xiaomi MI MAX (MI MAX), Android 6.0.1, CPU: Snapdragon 617 MSM8952, GPU: Adreno (TM) 510
VLNQA00087, Sony Xperia Z2 Tablet (SGP511), Android 6.0.1, CPU: Snapdragon 801 MSM8974PRO-AB, GPU: Adreno (TM) 330
VLNQA00317, Vivo V1924A (V1924A), Android 10, CPU: Snapdragon 855 SM8150, GPU: Adreno (TM) 640
VLNQA00273, Vivo V1821BA (V1821A), Android 9, CPU: Snapdragon 845 SDM845, GPU: Adreno (TM) 630

Testing environment: Windows 11 Enterprise

Notes:

Reproduction video/sound is attached as "video.mp4"
Not reproducible by CQA (Either locally not reproducible or missing devices to verify if reproducible)
Reporter noted that the issue might be reproducible only on AK4376 Audio Chipsets, CQA could not verify this
Original Audio Clip is attached as "sound.mp3"