Is this gestures or bug?

[prasanna moholkar]

I m on official windows 10 mobile update on Lumia 640 dual sim
On notification centre bar above we know there is button called"expand" but just click left side of that expand button u see that notification bar expand like pressing expand button.
Is this bug or update problem or gesture or my phone screen problem
Please help.

 

[Maurizio Troso]

I m on official windows 10 mobile update on Lumia 640 dual sim
On notification centre bar above we know there is button called"expand" but just click left side of that expand button u see that notification bar expand like pressing expand button.
Is this bug or update problem or gesture or my phone screen problem
Please help.

That's normal, there's a entire action line