NEO Coolcam curtain switch calibration problem

Hello everyone!
We have over 30 devices connected and everything works fine except Curtain switch (NEO Coolcam). There is no problem with functionality on/off works, positioning curtain from app also works.After calibration I’m able to fully open/close curtains. The problem is after 3-4 changes of position I’m not able to fully open the curtains. ( FULLY OPEN STATUS is moved lower that it was after calibration).It looks like the calibration is not correct or there is mistake in app Im not sure. Do you have idea what is the problem?

Do you use zwave or wifi version?
I‘m also interested in getting these switches.

Regards

Hello, where you able to fix this issue? I’m facing it with around 20 devices.