I think this is because we’re still on 1.35.1, I tested it in a new war room with a 1.36.1 agent and it works. Putting this here because it’s been confusing me and searching the web didn’t provide answers.
If you go to a war room, then the “Nodes” tab, there you used to be able to add displayed metrics by clicking the “(Gear) Metrics” button, then “Add New Metric”. That part still works, but when I go to select a context, it just says “no options”. Typing in the box doesn’t work either. Neither does entering one fully. This used to work, and custom ones we’ve added before continue to display — but we can’t add any new ones (or customize new war rooms).