Review on MFi Certified 6FT USB-C to Lightning Cable for iPhone 12 Charging, Lightning to Type C Charger Cord Compatible with iPhone 13/12/12 Mini/12 Pro/11 Pro Max/X/XS/XR/8, iPad 8th 2020 (Red) by Wesley Carreras

Received this on April 9th 2021. Worked fine for the 2 months I had. 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. More and more in this 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.