iPhone X Iphone X second replacment but same issue notifications lock screen disappear

[one_tech]

i have issues since i buy iphone x notifications lock screen when i swipe up to down all notifications lock screen disappear even the time and date ,, I replace my iphone x 2 time and issue come back i make restor without back up the issue come back the only solutions to make force reset but the issue come after a day so i need some explaining what going on with my iphone X ,,, any one have this issue
Why only happen in my iPhone X but i have iphone 7 plus and ipad but no issue with them see below the picture when i swipe from up to down ,, but if i swipe from left to right i can see my notifications so any one have any explaining

 

[C DM]

What iOS version is installed on the phone?

 

[one_tech]

What iOS version is installed on the phone?

Last one ios 11.3.1

 

[Newtons Apple]

Are you using your backup to restore your X? If so maybe set up as new.

 

[one_tech]

Are you using your backup to restore your X? If so maybe set up as new.

I set up new

 

[Newtons Apple]

I set up new

Strange indeed for two phones to have the same problem.