UCC14131-Q1: Output collapses when driving MOSFETs.

Tool/software:

Device operates normally for approx 28ms whilst driving UCC5880-Q1 with 4 MOSFETs. Device was configured using TI spreadsheet.

Works normally without being connected to MOSFETs. All voltages (Vfbbvdd, Vfbvee, Vdd-Vee, COM-Vee are correct).