MPEG2 DVD - MPCHC + LAV Video = no DXVA

K-Lite 17.5.2
Current versions of the player (2.0.0.30.2795a3284) and decoder (0.77.2.2-git).

Bug found - lack of DXVA when playing DVD (launch via VIDEO_TS.IFO). If you run VOB or MPG files directly, then DXVA works. If run through VIDEO_TS.IFO, then DXVA does not work.

For reference, I note that in BSPlayer the situation is the same.
If you replace LAV Video with "CyberLink Video/SP Decoder (PDVD10)" 8.4.1408 (clvsd.ax), then DXVA works.
I think it's in the LAV Video decoder itself. But it's easier for me to write to you than to write to the LAV Video forum. I understand you are in touch with the developer of LAV Video and now you are aware of the problem. Maybe you better contact him - I think it will be easier for you to solve it together. I think you have more knowledge about the player and you can tell him where to dig, which will speed up and simplify the solution to the problem.

DXVA2 is intentionally disabled for DVD. It can cause problems (with menus) in rare cases. It is also pointless to use since SD MPEG-2 is super easy to decode with CPU.

It's a pity. Than tightly blocking, it would be better to provide a choice. Or is there a hidden option to enable DXVA2 for DVD?