What happened to my Mopar electronic ignition orange box

I have seen the potting run out of ignition boxes and regulators. It seems to happen to most of them after time. It just decides to come out and run all down the firewall. Some boxes have more like a silicon potting, these are the good ones that wont melt out.
I have seen plenty of them melt all the potting out yet still work just fine. I have had it happen to brand new ones sitting in my parts bins.