Laggy notification bar

[Baka11]

I recently bought an a56 phone it's been great. Except when I want to pull down the notification bar when the phone is in the lock screen, there's a lag. It pulls down fine when my phone is unlocked. Only happens in the lock screen. What's going on?

[Fiona26]

Try a reboot or a restart on the device.

[Baka11]

Already tried that I'm a afraid