Hover text when completing function parameters is highlighted as markdown, but isn't markdown?

[chrg127]

Hello, I'm not sure if this is an issue with vim-lsp, my LSP server or simply a config error on my part, but I'll post here regardless.

I have vim-lsp setup with clangd on a C++ project. When I write a function call, this is what I get on the popup window for parameter hints:

I think it's supposed to render as markdown, but it just shows an error with the underline and some other noise. (Also, the documentation there is pretty clearly not written in markdown, but it tries to render it as markdown anyway)