As shown in the image, if you use this mod in conjunction with BoccHUD, the BoccHUD UI will be displayed twice.

The version is 1.21.1.

I have added this mod to my development environment and I see this duplication even when I delete the HUD layer. Are you sure Hud Compass is involved in the bug?

Yes. It will not interfere with other mods.
It also did not interfere with the older version (1.18.2).

Sorry, maybe it's not the case after all. I'll let BoccHUD know about it.

I can confirm this happening with Simple World Timer mod too.

When compass is enabled, timer hud displays twice.