Since you've changed the valve and you have the exact same symptoms, then there wasn't a problem with the original valve.
But with that said, if you installed the exact same model valve that you had before, it's having the same issue as the previous valve. There's probably too much flow going through the valve.
When it shuts off you're getting water hammer. That could be what cracked the pipe. And it will happen again if you don't fix it.
Is
this your valve? You could try fiddling with the flow control to see if you can make it some better.
But if there's room, maybe install a different model valve. Like
this one
If there's a way to lower the water demand on the zone in question, that would help a lot. Smaller nozzles or less heads would help.
Did you open the bleeder screw after installing the new valve? You need to get the air that's trapped inside out. That can cause a problem as well.