I've got the exact same storage issue on my iphone xr. Happened once before and it was fixed by doing a full reset and restore. That lasted about 6 months. I do

I've got the exact same storage issue on my iphone xr. Happened once before and it was fixed by doing a full reset and restore. That lasted about 6 months. I don't want to keep doing resets every 6 months. Has anyone found a simpler solution?