Describe the bug

if you set a nickname for someone, you assume that it will be private. if you reply to the person tho it will be in your message, see image below (it ends up in the formatted html, and in the plaintext)

Reproduction

No response

Expected behavior

No response

Platform and versions

Sable v1.9.3-dev (93a93a6)

Additional context

noticed here https://matrix.to/#/!c10y-Uq-tgKydroW9aXxmf0Y38itQqJRE9sBTK9SMMg/$2dIFUm5m-CYzZVfXCEqPS9MMP-cXnetlxvn7sUSTvhY?via=continuwuity.org&via=matrix.org&via=federated.nexus