Microsoft is reportedly still working to ease the issue on the device



From Neowin:

We reported a few months ago that Microsoft was working on a fix for the known touch sensitivity issue present on the Lumia 535. This update was then eventually released in select markets. However, it seems that for some the problem did not go away as intended.

According to a post on an Italian Microsoft Mobile forum, the company is still trying to fix the persistent touchscreen sensitivity bug affecting the Microsoft-branded smartphone.

  Microsoft is still working on a fix for Lumia 535 touchscreen issue