Anyone having this Double Audio Playback Issue!!!???

I am having this double audio playback issue. Where I am watching a video and the audio from previous video that I already finished starts playing in the background. IT IS SO ANNOYING, listening to two different audios at the same time, I CANT LISTEN TO ANYTHING. FIX ITTTTT!!!!!!!!!
Earlier there was this automatic video quality change issue, now this. A company that sells videos, fails to play videos, very cool. Give us boring UI like Coursera but make the video watching experience better.