The main issue is that there’s no way to determine what run you’re assigned in the LFG tool itself. But this is specifically a bigger issue in BRD. If you have someone below level 53 you know its a Detention run, and if you have someone level 58 or higher you know its an Upper City run. But if your whole party is between the levels of 53 and 57 its impossible to know what run you’ve been assigned, forcing you to run both if you guess wrong.
I will not be providing evidence or steps to reproduce. I don’t work for you.