I'm using this transistor as an H-bridge (class D amplifier), driven by the DRV8702Q1 from TI. The voltage supply is 30 V and the output filter is composed of a 82 µH inductor and a 68 µF capacitor.

The voltage generation is made using two PWMs generated by an FPGA, bipolar switching. The problem I have is that when I increase the output voltage to 22 V, one of the top transistor burns (gate-source resistance goes to 0). I've tried everything I could come up with, but still haven't found the problem.
All the gate driving signals seem all right. I'm using a driving strength of ~250 mA, which would seem to be ok.

Do you have any insight?