Hi after some tests and review code.

I figured out that default value for applySkipLimit is false when using with Promise.

applySkipLimit is set to true only if the given parameter is a function.
If no parameter is provided (no callback, returning Promise) applySkipLimit is equal to undefined which is a falsy value.

// file lib/cursor.js line 821
if (typeof applySkipLimit === 'function') {
      callback = applySkipLimit;
      applySkipLimit = true;
}