Kivy on Raspberry Pi 3 touch input got weird

[Wasenshi - Winkung]

Hello

I'm on a project where I want to have my app run on PI with touch screen display so touching is the only intended input (no mouse nor keyboard).

The app worked fine when I'm testing on Window. But the problem is, when I ported to Pi and run, it doesn't response to the touch input correctly.

It will randomly touch somewhere or something else instead. It will randomly act like it's received multiple touch or double click. 

Like, popup window got double opened, I cannot focus on text input and type properly (lost focus immediately).

I'm not sure if this behavior is a known issue or not.

Can you help me please?

Note: I already tested with mouse plugged directly to PI, and it's also weird. I also verify that the display's touch screen works correctly (another program works fine).

[Robert]

I can confirm you are not crazy. I tried using the desktop UI on PI and found touch issues.

I did not follow up, so I cant say for certain what the solution is, but try this (see final entry)

https://groups.google.com/g/kivy-users/c/BDpjv85RNig/m/A9STd59PAgAJ