Apple has released another update to iTunes. The 12.6 release the other day was version 126.96.36.199. This new release is 188.8.131.52.
This has happened previously. Apple released iTunes 184.108.40.206 on August 2, 2016 and then released 220.127.116.11 a short time thereafter—I think it was certainly by August 12.
Sometimes you just don't know how something is going to work until it's tossed into the wild. And you have to appreciate Apple's short turnaround.