Lightroom on iPad Lag on Detail panel

[#1]

I use iPad Pro for process RAW file. Adjusting on detail panel such as sharpening, detail, masking when I want to display the area overlay by hold tap finger on screen while dragging the sliders it very lag and unable to working at all.

[#2]

I use iPad Pro for process RAW file. Adjusting on detail panel such as sharpening, detail, masking when I want to display the area overlay by hold tap finger on screen while dragging the sliders it very lag and unable to working at all.