MT5 app for IOS stops recording price action while screen is off

 
MT5 app for IOS stops recording price action while screen is off. That creates a time gap, lack of chart continuity, indicators messed up. 

Problem appeared only 2 days ago on ipad and iphone, months before that everything was working perfectly.

I have cleaned the cache and updated apps however problem is still there.

What could happen?

Files:
IMG_3082.png  283 kb
IMG_9416.png  247 kb
 
Non of the links contained solution for my problem.