fails to work after calibration

[atomGit]

Clinometer 1.2.4 (IzzyOnDroid repo) Pixel 9 GrapheneOS (AOSP 16) memory allocater enabled memory tagging enabled

the app appeared to work fine before calibration, however it stopped working thereafter - all readouts display "NaN", the screen doesn't rotate with the device

• app was restarted
• phone restarted
• cache cleared
• cache and data cleared
• calibration done a 2nd time