Mosfet Driver IRS2007 failure when running with mosfet IRFB3607
You're most likely overloading the gate driver with the gate current at turn-off. Try removing the diodes D_RX_GATES and try again. If that helps, do a redesign with a turn-off resistor in series with the diode.

When turning on the transistor, the gate current is limited by V/R_G, when turning off, the gate current is limited by V/R_diode, where R_diode is the equivalent resistance of the diode (very low, that's why you need an additional resistor). That's pretty well covered in any basic application note regarding gate driver design, for instance: AN2015-06 from Infineon, take a look at fig. 8. 

AN2015-06 from Infineon