It's just been a few days since I got it installed but so far no issues as such. Thanks for explaining the issue to me
Thanks to Abhinav for explaining the issue to you. Will you please check by changing the Audio language on some HD infotainment channel (Animal Planet, Discovery) to some regional language & then switching channels, turning off the STB & turning it back on? Now see if the changed language has stuck by or did the STB change it to the default English language.