clangd #include command hinting in vscode

[qiyuewuyi2333]

I'm trying to learn OpenGl recently. And when I trying to include my head file, i encounter one issues.
The intelligenceEngine correctly give me the code(dir name) like the image below.

But when i push down the "tab"，

it doesn't give me the next hint, just end at "/".
But if I delete the "/", and input "/" by myself, the hint show up.

My final question is how to make the hint more smooth or comfortable ?

Thanku for answer.