When transmitting in the HF band, I sometimes experience sudden power loss, complete lack of power transmission, but after briefly pressing and releasing the PTT switch when switching to the 2m or 70cm band, and then switching back to the 6m band with a brief press and release of the PTT, the power returns. I don't know what the problem is. When using the built-in battery, the same issue occurs whether the battery is fully charged or not. When using an external power supply, the voltage is 13.8V.(づ・ω・)づ