progress slider stutter

[sclsj]

System and IINA version:

• macOS 12.3.1
• IINA 1.2.0

Expected behavior:

When dragging the progress slider, there is no delay and the animation is smooth.

Actual behavior:

When dragging the progress slider, there is a ~1 second delay. And the sliding action is not smooth. [seems to only occur on a specific album: sungazer's perihelion downloaded from Netease Music.]

Steps to reproduce:

Open an audio file from the album and drag the progress slider.

• MPV also seem to have this problem. It's smoother but still not as smooth as some random mp3s I have laying around.

How often does this happen?

Always.