SVP black bars feature and subtitles positions with softsub

Hi everyone and thanks to the SVP devs for their amazing works.

I have noticed a little problem on my config that i didn't succeed to solve by my self :

The problem is that if you use a Softsub file (let's say a ASS) that have position tag inside to adjust position of a specific line : the subtitles manager on the video player (let's say MPC-HC here) will use the coordinates of the SVP output.

But the SVP output can have a different ratio than the original video if the black bands feature are activated. If the original video was 4/3 and the SVP output video are 16/9 -> This result in a shift of the position on all subtitles when SVP are active.

So here is my question :
How to use the black bars features of SVP without messing with the subtitles positions ?

I have noticed that many subtitle manager are available on different player (like MPC-HC), maybe one of them can draw subtitles relatively to the original video ? I don't know ...

If you have an idea of solution, i take it

PS : I use MPC-HC - SV4-Pro - MadVR as renderer and as subtitles renderer, i have tried with xysubfilter, without any success.