https://github.com/qmk/qmk_firmware/issues/9060это походу как раз такое же.
если фича оледа включена, но самого оледа нет - начинается такое
when a user does not have an OLED installed, the keyboard becomes unresponsive.
I tried digging into the code but couldn't find the exact relevant piece. I suspect the firmware tries to initialize the display over I2C, but since there isn't a display, requests time out. This would happen on every matrix scan, causing many dropped keys - users report having keypresses sent only every two seconds.