A 0% bounce rate looks like a quality win. It is usually a quality warning. Either QA is not catching the problems, or the developers are absorbing the cost of bad tickets by rewriting the requirement themselves before they build.
The first failure is obvious: nothing bouncing means nothing being tested hard enough. The second is sneakier and far more common. The developer reads the ticket, shrugs at the ambiguity, decides what the PM probably meant, builds that, and ships it. The bounce never happens because the developer quietly did the PM's job. The PM never learns. The next ticket is just as bad.
A healthy workspace has a small, nonzero, honest bounce rate. Pyloq treats 0% as something to investigate, not something to celebrate. Perfection in a delivery loop is usually a hidden cost being paid by the wrong person.