Earlier today, my Kishi V1 suddenly stopped working while I was playing with it. I noticed that the LED on the right side was lit up, which was unusual, and my phone's notification indicated that it was charging via USB, despite being already fully charged. To troubleshoot, I attempted to charge my phone with the Kishi, which worked fine, indicating that the Kishi's USB port was functioning properly.
I then tried to hard reset my phone, but this did not solve the issue of my Kishi not being recognized. As a last resort, I restarted my phone while the Kishi was still attached and pressed and held LB+LT+RB+RT, similar to restarting an old PS1. Surprisingly, this fixed the problem, and my Kishi started working again.
If you're experiencing a similar issue, perhaps you could try this solution as a last resort and let us know if it works for you.
