RUMBA has 3 E plugs

Marlin/src/module/temperature.cpp

@@ -1660,10 +1660,9 @@ void Temperature::init() {
   #endif
 
   #if MB(RUMBA)
+    // Disable RUMBA JTAG in case the thermocouple extension is plugged on top of JTAG connector
     #define _AD(N) ANY(HEATER_##N##_USES_AD595, HEATER_##N##_USES_AD8495)
-    #if  _AD(0) || _AD(1) || _AD(2) /* RUMBA has 3 E plugs // || _AD(3) || _AD(4) || _AD(5) || _AD(6) || _AD(7) */ \
+    #if  _AD(0) || _AD(1) || _AD(2) || _AD(BED) || _AD(CHAMBER)
-      || _AD(BED) || _AD(CHAMBER)
-      // Disable RUMBA JTAG in case the thermocouple extension is plugged on top of JTAG connector
       MCUCR = _BV(JTD);
       MCUCR = _BV(JTD);
     #endif