I think there is another issue with the choice of mosfet driver for the application.
As I understand it, the H-bridge is to be used as an on/off and direction control switch. So it may stay in one state for more than a few seconds at a time. This type of high side driver uses a boost capacitor to create a high side gate drive signal that is more positive than the input voltage. This capacitor needs to be 'pumped' relatively often to make it work. How often will depend on a few things, but I would think at least once per second, maybe a few hundred times per second.
This issue was touched on back in post 23. While duty cycle is important, period is also important.
When using a mosfet for a high side static switch, you need to either use a p-channel mosfet, or make a super positive gate voltage in some other way. One gate driver that does so is:
**broken link removed**