Saving .go file in neovim with :w causes file to be messed up

I am pretty new to vim and Go. I am trying to write a simple go file. When I save my file with :w the file gets completely messed up. There doesn't seem to be any syntax or formatting errors. It seems like some autocmd is being run, but I don't know what. How would I debug this? Here is my file:

package main

import (
  "net/http"

  "github.com/gin-gonic/gin"
)

func main() {
  router := gin.Default()

  api := router.Group("/api")
  {
    api.GET("/hello", func (ctx *gin.Context) {
      ctx.JSON(200, gin.H{"msg": "world"})
    })
  }

  router.NoRoute(func (ctx *gin.Context) {
    ctx.JSON(http.StatusNotFound, gin.H{})
  })

  router.Run(":8080")
}

When I try to save with :w in neovim, my file gets messed up. Here is what the file looks like after :w:

package main

import (
  "net/http"
  api := router.Group("/api")

	"github.com/gin-gonic/gin"


func main() {
	router := gin.Default()


  "github.com/gin-gonic/gin"

)

func main() {

  router := gin.Default()

  api := router.Group("/api")

  {
      ctx.JSON({
 gi  api.GET(n/hello", fu.c (c{x *gin.Consexg) {"		c}x.JSON(
   .StatusNotFound, gin.H{})})
  }

  router.NoRoute(func (ctx *gin.Conxt) {
    ctxNStaus"github.com/gin-gonic/gin"

NotFound, gin.H{})
  })

  router.Run(":8080")
}

I'm not sure what is going on.

That should mean you are using the vim-go plugin, configured by default to automatically run :GoFmt when a Go file is saved.
The file is automatically formatted according to Go conventions.

For example, if you save this file:

package main

func main() {
fmt.Println("Hello, world!")
}

It will be automatically rewritten to the correct form:

package main

func main() {
  fmt.Println("Hello, world!")
}

Additionally, you can configure vim-go to use goimports instead of gofmt by adding the following line in your vim configuration file:

let g:go_fmt_command = "goimports"

This will not only format your code but also manage your imports (e.g., by inserting any missing imports).

If you find that the automatic formatting is causing issues or slowing down Vim, you can disable this feature by adding the following line to your vim configuration file:

let g:go_fmt_autosave = 0

After disabling automatic formatting on save, you can still manually format your code by running :GoFmt within Vim.