Explicit values not increased by heist enchant

There appears to be a bug with the explicit modifier magnitude increasing heist enchants. Some modifiers seem to be unaffected by the enchantment when they should be getting increased.

https://imgur.com/a/ej2lvWu

On this item the lightning damage is being correctly increased by 8% but the crit chance and cast speed which are also explicit caster modifiers seem to be unaffected.

I am aware that values are rounded down to the nearest integer in a lot of places in the game but don't think that is relevant here since the values did not change at all. If the increased crit chance was actually stored as 1.07 and then multiplied by 1.08 it would result in 1.1556 which would (presumably) be rounded down to 1 if it was truncated to the nearest integer.