And if they had been taking and completing those specific steps, they wouldn't be publicly trashing their CPS workers on their family website.
I know of a few reasons where CPS may terminate phone calls or suspend them for awhile.
My next door neighbor and close friend was a foster parent and often had several children in their home at a time. [Besides the 3 they adopted after their bio children grew up.]
Many of her foster kids were 'emergency placements' ---she'd literally get a call sometimes and a child or some siblings would be dropped off that same night. She didn't do long term placements after they adopted---she did emergency and short term placements, so the home life of those kids were often disruptive or dysfunctional, for them to be suddenly taken from their homes.
Often, after a phone call from home, the kids would cry after hanging up---mostly because they missed their family and were sad when the call ended. My friend was all in favour of those calls---even when they made the children cry because it was keeping them in touch with their loved ones and it helped in the big picture of things. So she comforted the kids and told them how nice it was that they had spoken to mom before bed, etc.
But there were other calls from home that agitated and upset the children. Sometimes one of the parents would be drunk or high and angry, and yell at them, warning them not to talk to the social workers, or the foster family, and even suggesting they run away, etc. Also, they sometimes got yelled at for ' making CPS take them from the home.' Parents would accuse the kids of saying the wrong things at school, and blame them for the family being broken up.
THOSE^^^ kinds of calls get reported by the fosterers to the social workers, to protect the children.
It would not surprise me if the boys had some of the agitating or disruptive calls in the past, which could suspend the parent's ability to contact until things were more settled.