Review on 🔌 6ft USB C to Lightning Cable [Apple MFi Certified] - PD Fast Charging Cord for iPhone 12 - 90 Degree Type C Charger - Compatible with iPhone 12/12 Mini/12 Pro/11 Pro Max/X/XS/XR/8, iPad 8th (Gray) by Allen Hart

Received this on April 9, 2021. It worked fine for the 2 months I had it. He started acting today June 11, 2021. When the battery is connected (and in vibrate mode, so it will vibrate every time this happens) the battery indicator will show that it will be charged within a few seconds. Pauses charging for a few seconds and then starts charging again. Keep going in that direction. Everything is fully connected. Switch to the standard charging cable that came with your phone (iPhone 12 pro) and it will charge normally. So it's the cable.