Arduino UNO USB VID_0x2341 PID_0x0043 REV_0x0001 DTR provide reset signal, it is likely a charge pump circuit to the reset pin of Mega328 MCU UNO R.1, and UNO R.3, the RESET circuit via pullup 10K ...

or USB-related execution issues in Arduino Uno clones that use the CH340G or CH340C USB-to-serial chips. These issues often result in the board freezing, rebooting, or repeatedly executing a single ...