Strange UUID Bson serialization behavior

[tchaloupka]

This test fails:

unittest
{
	UUID uuid = UUID("35399104-fbc9-4c08-bbaf-65a5efe6f5f2");

	auto bson = Bson(uuid);
	assert(bson.get!UUID == uuid);
	assert(bson.deserializeBson!UUID == uuid);

	bson = Bson([Bson(uuid)]);
	assert(bson.deserializeBson!(UUID[]) == [uuid]);
}

on assert(bson.deserializeBson!UUID == uuid); with:

object.Exception@data/vibe/data/bson.d(1512): Expected object instead of binData
----------------
/usr/include/dmd/phobos/std/exception.d:514 pure @safe void std.exception.bailOut!(Exception).bailOut(immutable(char)[], ulong, const(char[])) [0x64a756]
/usr/include/dmd/phobos/std/exception.d:435 pure @safe bool std.exception.enforce!().enforce!(bool).enforce(bool, lazy const(char)[], immutable(char)[], ulong) [0x64a966]
data/vibe/data/bson.d:1512 @safe void vibe.data.bson.BsonSerializer.readDictionary!(vibe.data.serialization.Traits!(std.uuid.UUID, vibe.data.serialization.DefaultPolicy).Traits).readDictionary(scope void delegate(immutable(char)[]) @safe) [0x5d75b5]
data/vibe/data/serialization.d:773 @safe std.uuid.UUID vibe.data.serialization.deserializeValueImpl!(vibe.data.bson.BsonSerializer, vibe.data.serialization.DefaultPolicy).deserializeValueDeduced!(std.uuid.UUID).deserializeValueDeduced(ref vibe.data.bson.BsonSerializer) [0x650d39]
data/vibe/data/serialization.d:576 @safe std.uuid.UUID vibe.data.serialization.deserializeValueImpl!(vibe.data.bson.BsonSerializer, vibe.data.serialization.DefaultPolicy).deserializeValue!(std.uuid.UUID).deserializeValue(ref vibe.data.bson.BsonSerializer) [0x650cdc]
data/vibe/data/serialization.d:299 @safe std.uuid.UUID vibe.data.serialization.deserializeWithPolicy!(vibe.data.bson.BsonSerializer, vibe.data.serialization.DefaultPolicy, std.uuid.UUID, vibe.data.bson.Bson).deserializeWithPolicy(vibe.data.bson.Bson) [0x650cad]
data/vibe/data/serialization.d:265 @safe std.uuid.UUID vibe.data.serialization.deserialize!(vibe.data.bson.BsonSerializer, std.uuid.UUID, vibe.data.bson.Bson).deserialize(vibe.data.bson.Bson) [0x650c45]
data/vibe/data/bson.d:1168 @safe std.uuid.UUID vibe.data.bson.deserializeBson!(std.uuid.UUID).deserializeBson(vibe.data.bson.Bson) [0x5d753d]

Because UUID is handled as object in bson serialization for some reason.
Is it supposedly correct behavior or bug?