Address the participant you want
Select a character portrait before sending, or type @ and choose a participant. Ask that speaker a specific question rather than asking the whole cast to explain several things at once.
Let the answer finish before changing speakers. One character can check a document while another describes the room, but each turn should make that responsibility clear.
Keep individual roles different
Give each participant a reason to be in the scene. Identical instructions can produce repetitive replies or let one speaker act for everyone else. State who should make a decision and leave your own character's actions open.
Group conversation, a standalone profile and a media-pack unlock are separate experiences with their own controls. Use scene prompts for writing changes and reply checks if a request fails to complete.