rotors would not stop

[moss99]

Hi all , i have just got a H501 a , I have done a couple of short flights without issue . yesterday however after a flight and some photos i used the return to home and it landed ok but the rotors would not stop , the altitude was showing 7 meters ? ? .
any ideas what the issue could be , as i had to remove the battery while the blades were spinning , or is there a control on the app to shut it off ?
Im using an iphone 7 ..

[Hubsan-Ailsa]

please lock the rotors by pulling the left virtual stick on APP to the nether left corner and right virtual stick to the nether right corner.

[moss99]

thank you..

[Looksgood]

Or.. Pull down virtual throttel and wait for second