Hey,
I have tried to escalate that issue via customer success and commercially with no result.
I then whined loud on linkedin, which finally got some real attention and some email ping pong with the product manager.
In a nutshell:
They say they have placed that logic all over the code and cannot add an option to tweak that easily. For me hard to understand, but well.
The issue is on the list, but not to be expected anytime soon .
By chance I saw the other day that the hubspot API returned a messageID for an email. If that is becoming a feature (it is undocumented as far as I know and no reply from PM about it as well), we could build a API module to fix this whole mess.
regards
Alex