Critical Hit and Committed will say that they're activating, but the damage will not change against enemies at all.  And Fuse Shot doesn't work because the arrow disappears upon the initial explosion, leaving nothing there to explode afterwards. It's like the game is trying to treat the arrow as the object to utilize the enchantments, but it does no damage, disappears and is replaced by the explosion which would act as a secondary damage type of some kind, unaffected by some enchantments similar to Shockwave on melee weapons.

Maybe? I don't know, but I wish this enchantment combo worked on my Firebolt Thrower.