Best guess is that the plant is under nourished.
My experience is that underfeeding tends to lead to overwatering, which just ends up smothering the root system.
If the grow media is too wet, carefully aerate it with a thin stick. Reduce the light level so that the plant is not exhausted by photosynthetic demands that cannot otherwise be met until the soil is sufficiently dried out to accept a richer feeding.
Checking your soil pH would be advisable is case you are experiencing lockout.