Can't pull down action center

[mikosoft]

Hi guys, Lumia 735 on CU. Today evening out of the blue my Lumia decided to throw another wrench. It froze and after restart when in start menu or any app I can't pull down action center. I can pull it down while on lock screen though. Happened to me once before but restart helped. Today I already restarted the device twice and it's still the same.
Any ideas?

 

[Timbre70]

SOP. Do a soft reset. If still doesn't help, hard reset. Think it's SOP as far as Windows Phone is concerned.