The information we have on USB-C of the AeroCooler 6 is that it only transmits the charge, your Kunai is connected via Bluetooth?, or USB-C which seems impossible?
Maj Firmware aerocooler failed, untimely disconnection, disconnected/reconnected to activate the freezing mode, on 6 and 6D are recurrent problems in the Chinese discus since October.
The moderator's last post indicated a fix on the next firmware, so in theory the .241 should fix this issue.