Nothing phone 1 crackling sound during call through speaker

Currently running on Nothing OS 2.5.3.A Android 14 but this issue is been since from Android 13 …is there anyone facing such issue!!!

I have also visited the service centre but after thorough checkup they said the speaker is good and perfect….. what may be this issue??

I have faced this issue too.
Sometimes it irritates the overall experience.

Facing issue too but this time when playing music at high volume!