I am experiencing this issue exactly as described.
I use a for loop in which loop body is connected to a transform on an actor and this transform is connected to execute console command with HighResShot
Loop runs 10 iterations but only 1 screen shot is saved.
if I chain 2-3 execute console command nodes one after the other in my process, I still only get the first one executed (note: all execute console commands are for HighResShot 1)