Overthinking/micromanaging.
Sipping a high-GI carb drink intra-WO is not much different than having low/moderate-Gi carb pre-WO.
The key is providing adequate fuel to your body for your specific goals as often as possible. The reason why carbs are discouraged before sleeping is that they are relatively fast absorbing; fats are more 'timed 'release.' However, you can always have a (smaller) meal in the middle of the night and be less discriminating against carbs.