Problem in typing

Problem in typing

Since Oct 22, whenever I use mobile zoho notebk,1) the cursor automatically brings me to the bottom of the page. When going back to my last sentence to continue typing, 2) it will bring me to next line where I cannot view the earlier sentence being typed 3) whenever I type & if I pause for a while, it will automatically scroll down to bottom blank page. Each time I have to manually find back the last sentence typed & error repeats. Reinstalling doesn't help, Zoho team, pls help to solve. thk you