Commented line inside fenced code block causing problems

Description

I have a fenced code block that looks like this

// express-fs-router/index.js
switch (typeof handler) {
  case 'function': {
    // export default function(req, res) {}
  }
  case 'object': {
    if (Array.isArray(handler) && handler.length) {
      // export default [function(req, res, next) {}, function(req, res) {}]
    }
  }
}

which is ultimately rendered as

Later in the same file I have a very similar fenced code block that does not cause a similar issue

// express-fs-router/index.js
switch (typeof handler) {
  case 'function': {
    // export default function(req, res) {}
  }
  case 'object': {
    if (Array.isArray(handler) && handler.length) {
      // export default [function(req, res, next) {}, function(req, res) {}]
      // get HTTP method from handler function name
      if (!method) method = handler[handler.length - 1].name
      // set to router
      router[method](route, ...handler)
    }
  }
}

which renders as

[josefaidt]

@ekhaled thanks for the link! Disabling hotReload in the svelte-loader options resolved the issue, interesting! @pngwn is this okay to close now that we have a resolution?

[pngwn]

Sure thing.