HO defaults "On" on high side/low side driver
Note that a bootstrap power supply needs a constant PWM, no DC signals. Further, your schematics is wrong, becasue the MOSFETS have to be connected together D and S. 

When lower MOSFET is conducting, then the bootstrap capacitor is charging trough D, then trough 22 ohm, then trough other 22ohm and finally trough lower MOSFET. And this is wrong.