[Bug] Mouse Button presses KC_BTN* only work when mouse cursor is moving

Describe the Bug

Expected behaviour

• If the mouse cursor is resting, e.g. the trackpoint is not being touched, the mouse buttons KC_BTN* in the keymap should work

Actual behaviour

• The mouse buttons don't work, unless the mouse cursor is also being moved

Blamed commit

I managed to trace the bug to the following commit: a850f7d69509a99ef46dd2790c2e55171db16e7a Mouse buttons work right before the commit was applied and stopped working with this commit.

keyboard configuration

ENCODER_MAP_ENABLE = yes
WS2812_DRIVER = vendor
RGBLIGHT_ENABLE = yes
COMBO_ENABLE = yes

{
.....
   "processor": "RP2040",                               
    "bootloader": "rp2040",                              
    "features": {                                        
        "bootmagic": true,                                                           
        "encoder": true,                               
        "extrakey": true,                                         
        "mousekey": true,                                            
        "ps2mouse": true                                        
    },                                                           
    "ps2": {                                                        
        "clock_pin": "GP27",                                          
        "data_pin": "GP26",                             
        "driver": "vendor",                              
        "enabled": true,                                 
        "mouse_enabled": true                            
    },
...
}                            

Keyboard Used

qmk compile -kb chrumm/leds38 -km btittelbach_65keys_mouse_rgblight

Link to product page (if applicable)

https://github.com/btittelbach/chrumm-qmk/tree/rgblight

Operating System

GNU/Linux

qmk doctor Output

No response

Is AutoHotKey / Karabiner installed

• AutoHotKey (Windows)
• Karabiner (macOS)

Other keyboard-related software installed

No response

Additional Context

No response