iplay 70 mini pro question

I am currently using the officially released iPlay 70 Mini Pro in Korea, and I would like to ask about two issues I have experienced:

When the tablet is placed on a flat surface with a case attached, the touch screen sometimes becomes almost unresponsive (randomly).
The specifications and testing apps indicate that the device supports both 60Hz and 90Hz refresh rates. However, when I run refresh rate tests on websites, it only shows around 70Hz. Could you explain why 90Hz cannot be utilized on such websites? Is there a specific setting required to enable 90Hz?
I would greatly appreciate your assistance in resolving these issues.

Best regards,

저도 케이스 씌워서 사용중인데 그런 증상은 없네요. 최신펌 올리신걸까요? 저는 오늘 최신펌 올라와서 업데이트 했는데 넷플릭스 와이드파인이 l3가 되어있습니다..-_-;;;  소프트 문제가 많아보이네요 ㄷㄷㄷ

the touch screen sometimes becomes almost unresponsive (randomly).

 

I installed a screen protector on mine and I also have this problem. I also ordered a case so I’m annoyed that the device also have other problems and that if I have to return the item. I lose money on the screen protector and case.