Remove additional « RE: » on email replies

What happened?
When I reply to a mail after multiple replies, it keeps adding « RE: »

What did you expect to happen?
It would me great to have only one « Re: » added to the subject like in Apple Mail (see pictures below).

Steps to reproduce
Reply to a conversation with already multiple replies

What mail provider(s) are you using?
Any (Outlook and iCloud for me)

What version of iOS?

What build number of Big Mail?
(You can find this in TestFlight)

Subject in Big Mail

Same subject in Apple Mail