I tested this by creating a fresh app with the yo angular-fullstack (running v 3.3.0) command choosing gulp and jade.
Reproduction steps.
after the npm i and bower install finishes.
gulp serve (works correctly)
change main.jade
save the file
console logs that the file is reloaded
Finally the page does not change like it is supposed to.
P.S. I have tested the same process with HTML instead of Jade and the HTML scaffolded app works correctly.