BTT SFS 2.0 - many wrong errors with the motion sensor --> many false positives

[Sonnenwerk]

Hi,
i activated both sensors. The encoder one does work.
With the motion sensor i get around about 50 errors within a one hour print.
Is there anything i can change in my setup ? For now it seems the motion part does not work.
Maybe depends on retraction setup ? Maybe on length ? No clue !
For length i tried the 2.88, 4, 6,10 and now 12..no difference !

`#region Filament Runout Control #########################
[filament_switch_sensor switch_sensor] # check if filament is there or not
switch_pin: ^PG12
pause_on_runout: False # if false, then run the runout_gcode
runout_gcode:
PAUSE # [pause_resume] is required in printer.cfg
STATUS_HEATING # Switch to a red alert light
EXTENDED_RESPOND PREFIX="Alert!:" PREFIX_COLOR="warning" MSG="Filament runout (switch NOK)" COLOR="error"
insert_gcode: #if filament is inserted again (return to normal state) then run this gcode
EXTENDED_RESPOND MSG="Filament inserted (switch OK)" COLOR="info"

[filament_motion_sensor encoder_sensor] # check if any movement issues
switch_pin: ^PG13
detection_length: 12 # 2.88 for perfect # some put it to 10 to work
extruder: extruder
pause_on_runout: False
runout_gcode:
#PAUSE # [pause_resume] is required in printer.cfg
STATUS_HEATING # Switch to a red alert light
EXTENDED_RESPOND PREFIX="Alert!:" PREFIX_COLOR="warning" MSG="Filament clogged !? (encoder NOK) actual use of text is to see how often altert is triggered" COLOR="error"
insert_gcode:
EXTENDED_RESPOND MSG="Filament cleared ! (encoder OK)" COLOR="info"`