Well i'm opening this issue in both repositories because i'm not sure what side need to make it - sorry if its not your responsibility.

Well, seems like when you have both Quark and Curios API (Baubles's spiritual sucessor into 1.15) installed, when i click on the Curios icon (the charm icon above the player head on inv screen) the Quark buttons like sort just disappear. I suspect the UI added by Curios doesnt inherit the Quark buttons.

Screenshot when the vanilla UI are open:

And when the Curios's charm button is pressed:

Is possible to make this compatibility? Just a little aesthetic, but anyway...

The issue on Curios's side: TheIllusiveC4/Curios#51

Thanks for your patience!