Would you mind if we ask TIDA-00366?
We developed the board which is very similar with TIDA-00366 desgin.
As the different point, there is the difference IGBT module only.
The voltage conditions are follows;
VDC+ and VDC- : DC24V
Gate driver voltage : DC16V
In this case, the voltage between U_TOP_REF～W_TOP_REF and VDC- were 15V.
By these voltages, it doesn't operate normally.
It seems that there is no problem on the board.
On your reference design board, does your board operate normally??
If you have some advice, could you let us know?