Incoming call isue

[gazmix8]

Hi

As of yesterday, when I receive a call I don't get the usual split screen with option to swipe right to answer or reply with a message etc. The screen stays black and I have to press the power button on the right to waken the phone then just option to answer or dismiss. Also if i go to phone settings>Apps & Notifications>Apps info>, i click on the phone app & app Notifications,the bottom area listed under Catergories is greyed out & at the bottom it says 6 catergories deleted with an 'i'in a circle.

Tech guy a Vodafone shop says it needs flashing which they can do in shop. 

Are there any other options available please?

Gaz

[gazmix8]

Forgot to say, when the phone rings with the black screen, i press power button to reveal the callers name, the sound of the ringtone stops but it carries on dialing until i accept or decline. 

It seems to be a problem with the pre-installed phone app, is there a way of updating or fixing etc

Would the Sony Xperia companion help although doing this may invalidate my vodafone warranty. 

Thanks

[gazmix8]

Update 

If I go to settings>Apps info>Apps>phone app> storage then I delete cache and data the issue resolves itself for a while then starts again after a few calls.

Help appreciated 

[Strampke]

Mmm, could be another app interfering.

Try safe mode and see if it happens there too.

[gazmix8]

Hi and thanks 

Yes I've tried safe mode. 

Under app settings>notifications >, should the incoming calls importance be set to urgent (make noise and pop on screen) in order to see incoming calls screen?.. High importance being just sound!!?

Thanks 

[gazmix8]

In the incoming call >call urgency, what is pop on screen? Is it the call screen the 'pop on screen' because the other options are just sound.