Thundering Enchantement bug

Enchantement description “Grants a 25-33-50% chance for 15-30-50% of weapon’s damage to spread as lightning”
2 bugs: (At level 3 for example)
Bug 1: Holding shoot button (right click by default) while using this enchantement with a fast shot crossbow, the “50% chance” apply less and less the faster you shoot. So The Cross Pollinator + Yellow Mushroom will apply on ~10% which is way below 50% chance.
Using the same crossbow but clicking 1 per shot will give the proper 50% chance.
Part of the same bug above, i would expect all my projectiles that land on target to have this 50% chance.
As it currently stand if i hit a target with 3 arrow at the same time, it still apply like i was shooting a single arrow.

Bug 2: “50% of weapon’s dmg” Apply less than 2% of the weapon’s raw damage, you should at bare minimum expect 50dmg from a Bow/Crossbow that deal 100dmg (not including all effect/artifact/talisman)
What i expect: To deal 50% dmg based off all my buff combined