Insteon PLM 2413U "Circle Of Death" during device add on Pi5

Tried two different 2413U PLMs and keep getting timeout errors when trying to add the PLM to HA. Running a RPi5 with the HA build straight from the Pi Imager that detects all the non-Insteon devices in the house perfectly. I get the full UART path displayed in the add device screen, but it never can go any further. dmesg shows the device connected to USB. Not sure where to go from here.