I have two PCF8575 breakout boards that I would like to connect to my Raspberry Pi 3B+ running Debian Buster kernel version 4.19.75-v7. Since both have the same address (0x20), I need to create a new I2c bus or change the address of one of the PCF8575's. I have read that soldering a jumper wire from ground to one of the pads on the bottom side of the PCF8575 breakout board would accomplish this.
After cutting a resistor leg and using that as a jumper wire from ground to the right-most A2 pad, the hardware address seems to flip-flop on the Raspberry Pi. IE, sometimes it will show as 0x20, 0x24, 0x25, 0x27 when performing
watch -n1 'sudo i2cdetect -y 1' on the Pi.
Has anyone else had a similar experience when trying to change the hardware address of an I2C device?
Edit: Here are pictures of the front and back of the breakout board: https://imgur.com/a/Gw9LbNv.