Finding power in a simple AC circuit
The power delivered by the source should exactly match the power dissipated by the resistor but this is only true once the circuit has settled down.

From a transient point of view energy is shipped out from the source and that energy produces heat in the resistor but also "charges" the reactive components.

This means that initially more power is taken from the source but, after the transient has settled down, the power in the resistor IS the power delivered by the source.

You have made a mistake but, you haven't shown your workings.