Marshal.OffsetOf returns invalid value in IL2CPP for misaligned fields on macOS

[StructLayout(LayoutKind.Explicit, Size = 3)]
struct Repro
{
    [FieldOffset(1)]
    public ushort foo;
}

public void ReproCase()
{
    foreach (var field in typeof(Repro).GetFields())
    {
        var offset = (uint) Marshal.OffsetOf(field.DeclaringType, field.Name).ToInt32();
        Debug.LogWarning($"{field.Name} {offset}");
    }
}