gbaf - toggle around a function doesn't seem to work for me

[esn89]

I have a function where my cursor is right in the middle of it.

I press gbaf sequence and my function doesn't get commented out. It is go + gopls language server and I have nvim-treesitter installed with the go module.

Anyone know why?

These are my settings (defaults):

return {
    'numToStr/Comment.nvim',
    config = function()
        require('Comment').setup()
    end,
}