I had the same problem today.
Before this happened I had unlimited empty trucks arriving. This wasn't too much of a problem as I could just keep the gates open and they would just pass through.
A few hours later my intake wasn't arriving (My guess is it was because of the unlimited trucks in queue). I would get paid at 8am for the intake but they never arrived.
Then later the empty trucks suddenly filled with shop supplies filling my delivery areas, and taking all of my workers time. This meant that if I started a construction, food wasn't arriving due to the backlog of trucks.
I am not sure if the 3 bugs are related but I thought I would share my experience of the problem.
Great game, can't wait for prisoner mode to come to console!