Not watered for a week. Why does the soil not dry even from above?

Four fabric pots of 27 liters. Below is drainage from vermiculite, above is a layer of coconut, above is soil from peat, humus, sand, and perlite, purchased. In the upper layer, perlite is twice as large. A hose from a weak aerator is brought to the bottom. Ventilation in the box is an active weak exhaust, a passive inflow below. Temperature + 29-30°C is stable. Besides four bushes, a little clover grows. I decided to dry the soil for overflow prevention. Did not water the bushes for a week. Even on the surface, the soil is still wet. There were no signs of overflow. One minus - the pots are on the floor, not on the grill. I noticed that the clover begins to die, as if withers and turns into humus. Could this be due to fungi and bacteria in EM 1? Why doesn't the earth dry for so long? Is it dangerous for the roots? Is it better to continue regular watering and top dressing, or let it dry without fertilizing, given that the third week of flowering has now begun?