Are you using double chests? those are not yet fully supported in MCServer - the server takes careful note which "half" of the chest you clicked and that half is displayed in the window, only.
But yes, we do currently have some issues with UI windows, I'll investigate into this issue.
Also, only one half of the chest makes the client show the chest opening animation, the other half opens the window without the animation.
But yes, we do currently have some issues with UI windows, I'll investigate into this issue.
Also, only one half of the chest makes the client show the chest opening animation, the other half opens the window without the animation.