Unreal Engine TArray Chained call giving different result compares to not using one

[NevermoreKilling]

Hi @tootzoe1 ! Thank you so much for you reply.

Your suggestion is accepted and tested.
Here is the result.(Only testing the last one,since case 1 is an OK for me)
Please feel free to ask for more , if you want more info or tests!

@tootzoe1

auto filteredResult2 { allVertexGridNodes().FilterByPredicate( {}) };

TLDR(joking)

Reference Assignment works.
But plain chaining without reference assignment keeps giving incredible result.

Test cases

case	result	note
VertexNodeShouldIncludeNickname61	OK	using temp variable to save filtered result
VertexNodeShouldIncludeNickname61WithChaining	NG	Chaining without using reference assignment
VertexNodeShouldIncludeNickname61UsingRefAssign	OK	Chaining with reference assignment

Test code

            It("VertexNodeShouldIncludeNickname61",
                [this]()
                {
                    auto vertexes = grid->allVertexGridNodes();
                    auto Is61Found = vertexes.FindByPredicate(
                        [](const TSharedPtr<PositionableNode>& node) {
                            return node->nicknameByPosition == FIntPoint{6, 1} && node->belongedPlayer == PlayerType::Player1;
                        });  //

                    TestTrueExpr(Is61Found->IsValid());
                    TestTrueExpr(((*Is61Found)->nicknameByPosition == FIntPoint{6, 1}));
                });

            It("VertexNodeShouldIncludeNickname61WithChaining",
                [this]()
                {
                    auto Is61Found = grid->allVertexGridNodes().FindByPredicate(
                        [](const TSharedPtr<PositionableNode>& node) {
                            return node->nicknameByPosition == FIntPoint{6, 1} && node->belongedPlayer == PlayerType::Player1;
                        });  //

                    TestTrueExpr(Is61Found->IsValid());
                    TestTrueExpr(((*Is61Found)->nicknameByPosition == FIntPoint{6, 1}));
                });

            It("VertexNodeShouldIncludeNickname61UsingRefAssign",
                [this]()
                {
                    // testing reference assignment
                    auto Is61FoundByRefAssign{grid->allVertexGridNodes().FilterByPredicate(
                        [](const TSharedPtr<PositionableNode>& node) {
                            return node->nicknameByPosition == FIntPoint{6, 1} && node->belongedPlayer == PlayerType::Player1;
                        })};  //

                    if (TestTrueExpr(!Is61FoundByRefAssign.IsEmpty()))
                    {
                        TestTrueExpr(Is61FoundByRefAssign.Top().IsValid());
                        TestTrueExpr((Is61FoundByRefAssign.Top()->nicknameByPosition == FIntPoint{6, 1}));
                    }
                });

test result