Always -1.3 degrees off

Simucube 1
1

I need to calibrate my wheel every day (I power off my Sim Racing computer when I’m not using it).
It’s always ~-1.3 degrees off.

Firmware: 1.0.30
30NM Mige SimRacingBay
Encoder: BiSS-C
Harware rev1 r004
Indexing mode: Absolute encoder

2

There is a thread about this issue, that we have not been able to repeat yet.

What if you set up non absolute indexing?