XPS 15 (9500) touchpad problem

After numerous Windows 10 updates, there's an issue on my XPS 15 9500 laptop.

A touchpad problem - actually it works well(with problem).

The problem happens after I use a bluetooth mouse(or other wireless mouses).

Before any mouse connected on my laptop, touchpad works well.

After I disconnect the wireless/bluetooth mouse, then touchpad won't work.

The thing is, if you enable 'turn on your touchpad when your mouse connected' on windows touchpad setting,

then my touchpad begin to work.

It is a very subtle and not major problem but it makes me so.... annoyed

is there any solution ?