Lava texture isn't working right

I'm making a resource pack with a x32 resolution, but I'm having a weird issue with the lava flow texture
it looks like it's defaulted to x16, even though the file itself is x32.

the only thing I have in the .mcmeta file is just the speed of the animation
{
"animation": {
"frametime": 7
}
}
and here's the lava_flow image for reference


I tried googling a solution for this, and made the flow texture x64 and aligned the texture to the center, but it just results in the missing textures grid. I really don't know how else to fix this so help would be much appreciated