Johnnyloans As for audio, it could be that you visit a news website and it autoplays a video with the sound muted but it is still prpcessing the audio. You scroll down through the article and the video still plays.
Or maybe, you're using an app that plays audio even if you turn your phone volume to zero. Games love to constantly play audio.
This might sound dumb but what if the user turns up the volume to hear what is being said once speech starts, now they can still hear it. Or the audio could double as a wait timer.
Nothing of this is related to my usage scenario. I'm not a gamer, so I don't have any games on my phone. Headphone volume is always the same, I know only Play/Pause. Firefox is set up to decline automatic start of audio and video playback.
But yes, for other users these could be causes for the problem.
It should also be noted that I never had such problems on another phone and my usage scenario on the road is always the same since I use smart phones, music via Bluetooth, messaging, looking for departure times of public transport and very rarely browsing. No social media. I'm not that guy who throughout has his phone in his hands.
The problem happened to me for exactly one time now, I will watch if this happens again and if not, I'm fine with that. 😁