I ended up sending my G6 into the LG repair facility in Forth Worth, TX to fix this issue. I paid the $33 expedite fee so they would have my phone repaired and returned to me in 1 week instead of 2 weeks. They ended up replacing the USB port on my G6 and I did get it back 7 days after sending to them.
They had installed Android 7.0 on it, so I needed to do a OTA update to get AT&T's Android 8.0 Oreo installed. After spending a day to reinstall all my apps, everything seems to be working ok (fingers crossed!).