This page lists all known hardware bugs for different SH-ESP32 revisions.
The silkscreen markings for the bottom side solder jumpers for GPIO pins 1 and 3 are incorrect. The solder jumpers for the TXD0 and RXD0 pins used for USB serial communication are labeled 3 and 34 but should be 1 and 3 instead.
Solder jumper labels 3 and 34 in the encircled region should be labeled 1 and 3 instead.
Affects boards up to revision 0.3.1.