BCC field content visible when using "Bounce" feature

[Aresil002]

Folks,

I have a strange issue with 1.4.11 :

1. I sent a message to 3 BCC recipients. Fields To: and CC: are empty.
2. I go to "Sent Items"
3. I use Bounce feature on this message.
4. I enter another 4 BCC recipients and push Send.
5. Some of these 4 BCC recipients can see these 3 original BCC addresses from the original message! Some email providers hide them however, so the issue is not deterministic. My personal gmail does not hide them though so it seems like a privacy issue.

I don't believe "Bounce" operation is supposed to work like that. Please advise.

[alec]

https://github.com/roundcube/roundcubemail/issues/7993

[Aresil002]

Thanks - indeed, that is exactly the problem I wrote about!