When the Real First Person Render mod is installed, upon dying with a Remnant Soul, the player's screen goes white. This only occurs while HUD elements are being rendered; if you press F1 to disable HUD elements, the rendering issue disappears. As noted in this comment, it's possible this is caused by the transparency effect on the ghost player, and this could be better solved if the Dissolution team works with the RFPR team.

Well, this issue still exists with the Fabric equivalent of RFPR...

Actually that issue doesn't exist anymore it seems, so I guess you can update to 1.16 if you want a fix =3