Why resonant charging produce "no current immediately after discharge"?
Discharge takes the capacitor voltage to zero.

What is the current through resistor R immediately after discharge with Vin across it (hint, Ohms Law, Vin/R)

What is the current through inductor L immediately after discharge with Vin across it (hint, dI/dt = Vin/L, which given that IL was zero prior to discharge, is what immediately after the instant of discharge? Further hint - a finite value for dI/dt means it cannot change in an instant)