[Bug] Task list icons are always unsharp

(Screenshot taken on Xubuntu 21.04 daily image with latest Xfce release on a HiDPI screen)

I'm using a 3840x2160p monitor with GTK scaling factor 2 and a panel size of 32px with the icon size locked to 16px.

And every icon, no matter which icon pack and which panel or icon size, scales really well, but the task list.

It seems to ignore the setting and always shows a very low resolution icon.

It doesn't change by changing the panel size, icon size, or icon pack.

Would be so amazing if someone could figure out what is causing this problem and fix it.

Otherwise, I really love everything you do and I am so grateful for all the effort that has gone into this project.

Please keep it up.