Strokes is getting deleted while writing When I’m writting with a stylus while keeping my hand on my iPad 6th gen ios 12.1.4, some of the strokes keeps dissapearing

My attempt to resolve

I found solution online suggesting me to turn off magnification feature . But this dint work the issue still persists. 

Also this issue happens with Apple Pencil,and many users have complained about this

I tied reaching Apple care people they were of no help.

So how do I resolve this issue?
I've run into this problem and it was caused by part of my hand hitting on the area where I am trying to write. If a finger or side of my hand accidentally comes in touch with screen the corresponding keystroke will not appear.