Update from troubleshooting
Device still not connected to apps. However, don't know why the light stop blinking. And now, I am controlling the light using the remote control, I dare not to touch the wall switch on button because if I switch on and off with the wall switch, the blinking will happened again.
So, now all the control is using remote neither apps nor wall switch.
This is not the solution for it. It defeat the value of smart lights. Unfortunately, this is really frustrating. Smart lights or ordinary traditional lighting...Up to personal preference and experiences.
Well, for the time being. I think this is the best to do .