Visual Studio Code – Paste Code in Microsoft Visual Studio has no Syntax Color highlighting

I have a problem when I copy code around in my solution in Microsoft Visual Studio (newest version). The pasted code doesn’t have color highlighting; it’s just white.

As seen in the picture, the "string" in "std::string" should be green, and "Test" should be blue, but both are white.

However, as soon as I move my mouse over the line and then press Ctrl, the line gets updated and has the correct colors afterward.

Does anyone have an idea of what could be causing this issue?