My best guess is that you’re experiencing over-training in conjunction with the growing pains of fat adaptation. If so, it’ll undermine both fat loss and muscle gain. The tell-tale symptom will be a persistent feeling of fatigue and mental fogginess, and reduced performance. If you’ve over-trained in the past, you may have experienced persistent soreness as well because recovery ability becomes increasingly impaired, but that symptom will often be absent on keto because it’s a very anti-inflammatory diet that significantly reduces the sensations of soreness after training.
You probably just need to tweak your workouts/frequency a bit. Some more information about your current workouts and priorities (fat loss vs muscle gain vs training for 10k) would be helpful and probably elicit more targeted responses. It’ll also help to get some basic stats (height, weight, age, hours of sleep per night). This will help folks make some recommendations on how to tailor your workouts to meet your goals and get your energy levels back up.