Gravy Goes Wrong!

On occasion when I roast a chicken I place a lemon half in the cavity, and sometimes when I slow cooker a chicken I add a lemon half to the liquid. It adds a nice citrus zing to the finished gravy.
I found out that adding a lime half to the slow cooker liquid adds a nice zesty flavor to the chicken, however it gave the gravy an awful bitter taste that was quite gross.
But, not to waste I saved the bitter gravy and some pasta water and made a soup with it.

Making the Soup

The soup had a few leftover potatoes in and some stale bread to thicken it. Once cooked I added the scrap chicken meat and pureed the soup.

Not bitter at all