Timelag between Youtube video audio and Karaoke lines

I have imported YouTube videos and tried to use the Karaoke function with them. It’s okay for a couple of sentences but after that, there is a time lag between the video audio and the karaoke lines becoming bold. Is there anything I can do such as adding a or suppressing “paragraphs”?

I asked our team to look into it. Can you please send us a link to one of the lessons you have a problem with to support@lingq.com? Thanks.