Instability using Crunchyroll

When I to try to cast an anime from Crunchyroll using SVPtube, it may start to lag, visibly dropping frames. I don't know why, but this happens when it is a episode that I haven't watched. In my screenshot, the first 2 graphics show episodes that I have watched in the same day (they also lagged in the first time), and the third show what happens when I try to watch another episode. I also tried to change my SVP settings, but nothing worked, and the log have nothing that could help. I am using mpv player, with custom settings. Also, I have a 40MB download/upload internet, so it is not because of it. Thanks in advance.

My settings:
CPU: I5 7400
GPU : GTX 1060 6GB
Ram: 8GB