Code folding isn't working properly

[MrJGao]

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Hi, for some reason, the code folding doesn't work properly on my side.

There's either no folding at all:

Or, folds my function but I cannot unfold it, i.e., it just hides everything in the function and seems no way to unfold the function.

Any ideas? Thanks.

[MrJGao]

And, it seems vscode starts several language servers automatically at startup. Is it normal?

[MrJGao]

I tried to use the following code in .Rprofile to disable foldingRangeProvider, but it didn't work

options(
    languageserver.server_capabilities = list(
        foldingRangeProvider = FALSE
    )
)