Gretta Duleba has an article about Relationship Known Issues. In software, a Known Issue is a problem that the developers know about but have no plans to fix—because it would be hard, because the issue doesn’t matter much, or because they just have more important things to do.
I also like Ozy Brennan’s https://thingofthings.wordpress.com/2019/04/19/four-kinds-of-relationship-problems/