Since I am having 10+ e-mail accounts in a TB 115.16.0esr (latest stable on Debian 12), I am using Unified Inbox where i can read all received mail under one "folder". Though when I do it and right click received mail, select Forward as > attachment (or just Forward), then the Thunderbird wrongly sets different account of mine as a sender instead of the one which received the message.

I need to always bother checking this and switching (sometimes i forget and send from a wrong accoung, which is also a privacy issue), which is annoying and I am unsure if I have misconfigured the TB or how to fix this? Thank you