Audio out of sync but only for part of the video

I am editing a 4 hour video that is downloaded from Twitch. I edited what I wanted from earlier parts of the video. Then when I went to edit later parts, the audio was completely desynced. In the downloaded file all audio is fine. As soon as I drag the video into Premiere part of the video is going out of sync. I read other posts talking about variable framerate but I don't understand how that would apply here because it's all the same downloaded file. It's not my raw footage. Is there any fix for this? I'm at a complete loss.