Board Thread:General Discussion/@comment-33215561-20180204210355/@comment-2605:E000:D2CB:9AF0:7DBF:A8BF:36D6:9222-20180205034029

I noticed the same thing. I play a Lot, completed it in a couple days, one shot of vigor the next day and only 3 brown bottles ever since. Do not believe it is random.