Orbiter v2 sensor and happy hare for ercf v2 klipper setup

[Alphablock23]

Hello everyone , 

I just finish my ercf v2 , and after all the calibration i notice an issue with my setup , I run a orbtier v2 extruders with it's sensor before i order my ercf , but now i notice something that i quite an issue and after many research i cannot find any answer .Here is the problem , when i load filament from the buffer to the extruder , i load the filament to the hotend by itself (as the basic macro should do) but the issue stand in the pull out the the filament , as with a missing config that i don't know how to setup , when the print change color , it try to unload it from the ercf motor , and the filament is still engage into the hotend , i cause a filament break , and issue (you know ) .I was wondering if anyone ever use this setup and if you have some tips to fix this issue that is cause me to not be able to use my ercf 

Thanks