Since the HS line is most likely connected directly to the load, having inductive collapse would simply put a (-), not common, potential on the HS line which will increase the overall voltage supplied to the driver inside the chip. (Vee and HS). to solve that, put a heavy clamp like a zener/transorb across the Vcc and HS line. This should absorb the over voltage being generated.
The other problem could be that you are not properly latching the low side on in time to clamp this energy. If you are attempting to do so, maybe you need a small cap to handle the clamp while the low side fet is clamping. If you are free running the circuit at times, then you are in trouble. Induction will kill your driver chip on the high side if you don't have some kind of clamp there.
In most digital drives, especially AC inverters, you have the option of using a DB resistor which ties to the DC bus and goes through a switch that clamps the bus while the motor is not under load, other wise, you'll get over voltage on the DC bus due to the motor regenerating energy that adds to the bus through the protective circuits in the bridge..
Something to ponder on.