I have not stabilsed many C41 rolls for some time as I ran out ! HOWEVER -- on one roll of 120 XP2 Super I did a year ago I notice some uneven 'brown' effects compared with the usual more 'Magenta' colour
Regarding RETICULATION -- YES -- Ilford XP2 Super and their FUJI equivalent DOES reticulate easily on the backing super-coat if a 'PRE-SOAK' is used and also if you RINSE quickly with water at 100oF between the Developer and the Bleach, so it is really necessary to go straight into the Bleach from the Developer. I have NOT had any Reticulation of COLOUR C41 emulsions under those condtions of pre-soak and rinse.