2022 Chevrolet Bolt EUV Tires & Wheels Problems

I installed four new Goodyear ElectricDrive 2 tires (P 215/50 R17) on my 2022 Chevrolet Bolt EUV on 05/08/2024 at Discount Tire in Round Rock, TX (Store #TXA 23). The tires were balanced as part of the installation. After six days of normal commuting, on 05/14/2024, the vehicle began experiencing significant vibrations at highway speeds 60 - 70+ mph. As a point of reference, the passenger side headrest was visibly moving back and forth due to the vibration. I took the tire back to Discount Tire and, after removing the tire from the wheel, they discovered that the SoundComfort noise reduction foam inside of the tire had come dislodged and was bunched up inside of the tire. The foam did not appear attached to the inside of the tire in any way. After the foam was removed and the tire remounted, the vibration was no longer present. What component or system failed or malfunctioned, and is it available for inspection upon request? The noise reduction foam inside of the tire came loose inside the tire and caused the tire to become out of balance. The tire is currently mounted on the car but with the noise reduction foam removed. How was your safety or the safety of others put at risk? Significant vibrations while operating the vehicle could distract the driver or under certain circumstances cause impair the driver's control of the vehicle especially at higher speeds. Has the problem been reproduced or confirmed by a dealer or independent service center? Yes, Discount Tire diagnosed the issue by attempting to balance all four wheels, discovering one was out of balance, and then proceeded to remove the tire from the vehicle. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? No warnings lamps or messages. A significant vibration at highway speeds was the only symptom and began being observed on 5/14/2024 (6 days after installation).