You will find that changes getting applied after reboot MC...
My color rules for junctions and symlinks are not applied after restarting MC.
They worked in 11.6 but don't work in 12.0
Occasionally in 11.6 they would not be applied on initial display of a folder, but a refresh would fix it.
Problem reproduced on 2 systems upgraded form 11.6 to 12.0
Also tried on new install of 12.0 on system which had not had MC installed before. Added new rule to color symlinks and/or junctions. Exit MC and restarted. Color rule is not applied.