[Bug] PMW3360 Trackball sensor unequal CPI on the master/slave halves

Describe the Bug

When I set #define PMW33XX_CPI 6000 both senshors should be the same in the movement sensitivity. But for some reason the slave sensor moved slowly. I.e. slave cpi = master cpi / 2. Can't find the reason why this behaviour remains if I switch the master/slave halves. I'm using f401 with full duplex and SPLIT_HAND_PIN.

Keyboard Used

fabis

Link to product page (if applicable)

https://github.com/Onefabis/qmk_firmware/tree/Haptic_split/keyboards/fabis

Operating System

Windows

qmk doctor Output

Ψ QMK Doctor is checking your environment.                                                                                              
Ψ CLI version: 1.1.1                                                                                                                    
Ψ QMK home: C:/Users/Alex_Laptop/qmk_firmware                                                                                           
Ψ Detected Windows 10 (10.0.22000).                                                                                                     
Ψ Git branch: Haptic_split                                                                                                              
Ψ Repo version: 0.19.5                                                                                                                  
⚠ Git has unstashed/uncommitted changes.                                                                                                
Ψ - Latest Haptic_split: 2022-12-24 23:40:28 +0300 (036ad6bc8b) -- Update readme.md                                                     
Ψ - Latest upstream/master: 2022-12-28 05:29:19 +0900 (4c32e060e8) -- [Keyboard] Add XR63GL keyboard (#19380)                           
Ψ - Latest upstream/develop: 2022-12-27 20:29:52 +0000 (40fddcb1e5) -- Merge remote-tracking branch 'origin/master' into develop        
Ψ - Common ancestor with upstream/master: 2022-12-23 18:14:23 +0000 (b56c0fa674) -- Bump actions/stale from 6 to 7 (#19392)             
Ψ - Common ancestor with upstream/develop: 2022-12-23 18:14:23 +0000 (b56c0fa674) -- Bump actions/stale from 6 to 7 (#19392)            
Ψ All dependencies are installed.                                                                                                       
Ψ Found arm-none-eabi-gcc version 10.1.0                                                                                                
Ψ Found avr-gcc version 8.5.0                                                                                                           
Ψ Found avrdude version 7.0                                                                                                             
Ψ Found dfu-util version 0.11                                                                                                           
Ψ Found dfu-programmer version 0.7.2                                                                                                    
Ψ Submodules are up to date.                                                                                                            
Ψ Submodule status:                                                                                                                     
Ψ - lib/chibios: 2022-09-18 10:01:17 +0000 --  (0e9d558b5)                                                                              
Ψ - lib/chibios-contrib: 2022-10-03 18:09:41 +0200 --  (bb8356fb)                                                                       
Ψ - lib/googletest: 2021-06-11 06:37:43 -0700 --  (e2239ee6)                                                                            
Ψ - lib/lufa: 2022-08-26 12:09:55 +1000 --  (549b97320)                                                                                 
Ψ - lib/pico-sdk: 2022-09-19 18:02:44 +0200 --  (8d56ea3)                                                                               
Ψ - lib/printf: 2022-06-29 23:59:58 +0300 --  (c2e3b4e)                                                                                 
Ψ - lib/vusb: 2022-06-13 09:18:17 +1000 --  (819dbc1)                                                                                   
Ψ QMK is ready to go, but minor problems were found

Is AutoHotKey / Karabiner installed

• AutoHotKey (Windows)
• Karabiner (macOS)

Other keyboard-related software installed

No response

Additional Context

No response