The secondary extruder gets caught and will break the wires; especially caught in the extruder feeder arm on the 1st taking the 2nd’s wire when it’s trapped.
Include basic holders like these : https://www.amazon.com/gp/product/B08DM89NQD/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
