Yeah I've found unless you get them square super strong fabric pots like the Plant!t 11L square fabrics they have a tendency to run out of the sides unless you use a dibber to create feeding bores on the top layer of substrate and where you get the substrate coming away from the sides of the pots to stop it all just running down the sides.
Wouldn't even know how to stop it happening in a fabric autopot system unless you create like a spiral with a thin rounded chop stick heading in a slight diagonal position emanating from when the system feeds which I guess might work.
Either way I think a fabric autopot system sounds appealing in theory but it must be a bit of a pain! I'm glad I put off buying that as I cant deal with unnecessary mess
BTW
@NiceOption and
@Froot n Fuel I'm going to be starting to use some Coco in my substrate to allow for soil recycling but I'll also be watching you guys a little closer as I think I'll be doing an Auto AL-47 in coco to give me a little introduction to soilless growing so I'll be very much appreciating any extra experience