Particle - LED solid Green

Firmware
1

I have the code below. Occasionally, when this case gets initiated an Electron will show a solid green LED (no blinking/breathing). What may cause such behaviour? Is it Particle.syncTime()?

I’ve never really come across a solid green before - does it mean the code is blocking?

 case CONNECT:
        xl.readXYZTData(X, Y, Z, T);
        if (!initCON) {
            Serial.println("connecting to the cellular network and Particle Cloud. Please allow up to 90 seconds.");
            EEPROM.get(addMode, mode);
            EEPROM.get(addX1, X1);
            EEPROM.get(addCollection, collection);
            EEPROM.get(addRebootno, rebootNo);
            Particle.connect();
            initCON = true;
            }
        if (isValid(X) && millis() - sampleTime >= 500) {
    	    sampleTime = millis();
    	    X2 = std::abs(X-X1);
    	    if (!collection && X2 >= 400) {
                state = XL;
                break;
	            }   
    	    }
        if (Particle.connected()) {
    	    Serial.println("connection established!");
            Particle.publish("spark/device/session/end", PRIVATE);
            Particle.syncTime();
    	    if (mode == 1) {
    	        stateTime = millis();
    	        state = GPS;
    	        break;
    	        }
    	    else {
    	        stateTime = millis();
	            state = PUBLISH;
	            break;
                }
            }
        if (millis() - stateTime >= 90000) {
            if (rebootNo < 3) {
                EEPROM.put(addReboot, true);
                EEPROM.put(addRebootno, rebootNo + 1);
                snprintf(buffer, sizeof(buffer), "This is connection attempt %i. re-attempting in 10 seconds.", rebootNo);
	        Serial.println(buffer);
                Cellular.off();
                delay(2000);
	            System.sleep(SLEEP_MODE_DEEP, 10);
	            break;
                }
            else {
                Serial.println("connection attempt threshold reached");
                state = SLEEP;
                break;
                }
            }
        break;

On another note, I notice sometimes that when this code runs:

          if (rebootNo < 3) {
                EEPROM.put(addReboot, true);
                EEPROM.put(addRebootno, rebootNo + 1);
                snprintf(buffer, sizeof(buffer), "This is connection attempt %i. re-attempting in 10 seconds.", rebootNo);
	        Serial.println(buffer);
                Cellular.off();
                delay(2000);
	            System.sleep(SLEEP_MODE_DEEP, 10);
	            break;
                }

The message prints fine, but the Electron remains stuck in blinking green/cyan (whatever it’s doing) and not actually turn off the Cellular and go to Sleep. Am I missing something here about the Cellular.off() functionality?

EDIT: I’m starting to think this specific Electron may just be broken…the behaviour here is very strange and not in line with any of my other Electrons.

2

Is this possibly the same situation?

Solid Green Light