C# Compiler bug: allows for conversion from Nullable<decimal> to decimal

Consider following code:

    public class DecimalWrapper
    {
        public static implicit operator DecimalWrapper(decimal x) => new();
    }

    [Fact]
    public void Test()
    {
        // Why this even compiles? Since there is no implicit conversion from decimal? -> decimal
        DecimalWrapper c = (decimal?)null; // variable 'c' is null!
    }

I would not expect it to compile at all, since there is no implicit conversion from decimal? to decimal.

I consider it a bug or do I get something wrong?

I have seen this: Serious bugs with lifted/nullable conversions from int, allowing conversion from decimal

but this looks different and it is old (7+ years), so the bugs should be fixed by now, but cannot be sure since all the links to bug reports are gone)... :(

I would really like to use such code in real solution (tracking of calculations), but this prevents me from it.

PS: I am compiling on Windows.