Node with ESP8266 and RFM95W

has the same bug:

void LMIC_disableChannel (u1_t channel) {
if( channel < 72+MAX_XCHANNELS )
LMIC.channelMap[channel/4] &= ~(1<<(channel&0xF));
}

That 4 should be a 16 to get the right byte of the array - only affects CFG_us915.

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