can't see all saved sounds?

On tik tok on my phone, I can see some of my saved sounds but not all. Sometimes when I save new ones they will show up under favorites and others will not, and sounds I've had saved for a while have disappeared. There's still plenty of sounds there, but many are missing. When I access tik tok on my IPad, they are still all there and none I've saved are missing like they are on my phone. Why does this happen and is there any way to fix it? I'm missing around 3/4 of my saved sounds!