Suno Persona keeps pushing vocals into high register – any way to lock low range?

Hey everyone,
I’ve noticed that whenever I enable a Persona in Suno, the vocals tend to drift into a higher register, even when my style prompt clearly asks for low register, half-whisper, talk-singing, or restrained delivery.

If I disable Persona and rely only on style prompts, the model usually stays in the lower range much more reliably.

I’m trying to build artist-focused albums with consistent low-range, intimate vocals (trip-hop / dark pop / industrial / minimal pop type aesthetics), so I’m wondering:

• Is there any known way to reduce Persona’s influence on pitch range?
• Any specific prompt phrasing that actually overrides this behavior?
• Or is the current best practice simply avoiding Personas for low-register work?

Would love to hear how others are handling this. Thanks!