The H-bridge will not work as described. The inputs must be driven with complementary voltages. When input A is high input B must be low. So both inputs must be driven with complementary PWM voltages. One input cannot be held high or low while the other is driven with a PWM signal.
Test to see if your circuit works DC. Put A high, B low and see if OUTA is high and OUTB is low. Then reverse and test again.