Prevent packet errors from growing

src/helpers/radiolib/RadioLibWrappers.cpp

@@ -176,7 +176,10 @@ bool RadioLibWrapper::isChannelActive() {
   if (_threshold == 0) return false;    // interference check is disabled
 
   int16_t result = performChannelScan();
-  // scanChannel() leaves radio in standby — restart RX regardless of result
+  // scanChannel() triggers DIO interrupt (CAD done) which sets STATE_INT_READY
+  // via setFlag() ISR. Clear it before restarting RX so recvRaw() doesn't
+  // try to read a non-existent packet and count a spurious recv error.
+  state = STATE_IDLE;
   startRecv();
   return result != RADIOLIB_CHANNEL_FREE;
 }