Reflector gets wrong decompiling result?

[WhoCares]

same dll and same function body, different decompiling results for Reflector, dotPeek, dnSpy(all are latest versions).

Reflector

    private uint e(byte[] a, ref int b)
    {
        b += 4;
        return BitConverter.ToUInt32(a, b);
    }

dotPeek, dnSpy

  private uint e(byte[] a, ref int b)
  {
    int uint32 = (int) BitConverter.ToUInt32(a, b);
    b += 4;
    return (uint) uint32;
  }

IL of function body

  .method private hidebysig instance unsigned int32
    e(
      unsigned int8[] a,
      int32& b
    ) cil managed
  {
    .maxstack 8

    IL_0000: ldarg.1      // a
    IL_0001: ldarg.2      // b
    IL_0002: ldind.i4
    IL_0003: call         unsigned int32 [mscorlib]System.BitConverter::ToUInt32(unsigned int8[], int32)
    IL_0008: ldarg.2      // b
    IL_0009: ldarg.2      // b
    IL_000a: ldind.i4
    IL_000b: ldc.i4.4
    IL_000c: add
    IL_000d: stind.i4
    IL_000e: ret

  } // end of method e