Castlevania The Dracula X Chronicles US

[Foffy]

Sorry if 'bumping' this for a solution to my problem is uncalled for, but perhaps someone can help me.

When I play Symphony of the Night in the game, it seems very few of the filters like XBR work. They'll work on some assets and not others, which is jarring. Worse still for me is that it appears bilinear filtering doesn't work at all. I've tried to use the Spine36 upscaler as a substitute as it kind of gets a similar job done, but I was wondering if this is a known issue in the emulator, or an issue in settings?