Code completion doesn't work correctly for nested structs/unions

I use the following union type (TTestUnion0) often to access the single bits of a byte. In this case, code completion doesn't work correctly, it shows all fields (Bit0, Bit1, Bit2, Bit3, Rest, Bit, Byte) in a flat hierarchy (see attachment).

However, if I define the Bitfield on it's own (TTestStruct) and use it in a union (TTestUnion1), everything is fine.

typedef union {
struct

{ char Bit0: 1; char Bit1: 1; char Bit2: 1; char Bit3: 1; char Rest: 4; }

Bit;
char Byte;
} TTestUnion0;

typedef struct {
char Bit0: 1;
char Bit1: 1;
char Bit2: 1;
char Bit3: 1;
char Rest: 4;
} TTestStruct;

typedef union {
TTestStruct Bit;
char Byte;
} TTestUnion1;

void test()
{
TTestUnion0 u0;
TTestUnion1 u1;

// completion doesn't work correctly
u0.Bit0 = 1;

// completion works!
u1.Bit.Bit0 = 0;
u1.Bit.Rest = 4;
}

It would be very nice, if this could be improved!