No. You're burning protein from your muscles. Try burning protein from your diet. Hard cardio burns not only carbs but also protein (obviously). Give it a try: 30' before a ride, 15g whey protein + 10g sugar in ~6 oz. water. Immediately after the ride, 25g whey protein + 20g sugar in ~16 oz. water. Report back. Quantities are experimental, can probably be improved upon.

After each commute leg, have maybe 15g whey protein + 10g sugar. Mix it up ahead of time. Or the same thing before rather than after, but not both. Weight loss might stop or at least slow..