It doesn't make any sense that Yi's Q cd reduction on autoattacks doesn't work in Kindred's ult.
It's inconsistent. BECAUSE they are not invulnerable. Kindred's ult isn't invulnerability, it's similar to Tryndamere's ult : people can't get below a certain amount of health. And guess what? It works normally against Tryndamere. 100% inconsistent here.