Import and Strict Null Comparison, why are 0 values considered as NULL and why can't I change that?

[Cyril-Cf]

Hello, at my company we're trying to use Laravel Excel but we still have issue on IMPORTS (not exports), where a 0 value is actually considered as NULL when it shouldn't be.

We use validation rules such as :
$rules['Some_Column'] = 'required_unless:Some_Column,null|nullable|string'

With the 0 values, we can't properly validate our data, we want the value 0 to be considered as a 0 and not a null. Implementing the trait WithStrictNullComparison only applies to exports as far as I understood it, so it doesn't help our case. I found an old closed ticked on this matter but no real solution to get around this issue, any idea?