No overworld music after boss?

I notice that no overworld music plays after you beat a level that ends with a boss battle (or any battle that ends when all sprites are gone).
I want to get rid of this for the hack Dispari Scuro and I are working on.
I'm wondering if there's some sort of a ROM map entry that handles this that can be hacked. It's not mentioned on the site's ROM Map page. Would anyone be able to help me with this?

Thanks.

Try to change one byte at 0x2102E to "80".
I think this fixes that. I don't know if this causes something else, though...

It works! Thank you so much.