I think these items should either just work, and be nerfed if they're too problematic balance wise, or have a modifier for melee spells like '60% effective on melee spells' so they can be easily adjusted. Them not working at all is imo not a good design choice even if it is intended.
Specifically warden 3 when it deals dmg cancels carpet, but there are many cases where carpet is cancelled by spells even if you don't take any action that should cancel it.