This happens with such regularity that I feel like it needs a name at least. When it starts to happen, I can predict where the ticket will end up with some amount of accuracy. But has anyone found a way to engage with this phenomenon?
The reason I feel it's an issue is that all good work has some amount of uncertainty to it. By that virtue you can deprioritize almost anything this way.
If you are worried that stories that do have more importance are falling victim to this pattern, it is probably a communication or collaboration problem with the team.