Reply to email is sent from wrong email address

I have read inquiries about this problem going back to 2012, yet the issue persists. Surely this is something the Apple geniuses can fix.

My problem: I use 2 different email addresses on my IOS devices - let’s call them A and B. I send all my new emails from A and it is my default account in settings. When I receive an email it is addressed to A because that is the email address I want the public to know. However, when I reply to an email, the Mail application often chooses to use account B as the ‘sent by’. That is a problem for me for many reasons not relevant here. Yes, I know I can take the time to carefully check the reply to be sure it used the correct account (A), but I don’t always remember to do that, and I should not have to do that. Apple products cost a lot because they are supposed to be the best, yet this simple to fix problem has gone uncorrected all these years. I have read all the suggested fixes and work-arounds and have tried them. Deleting the ‘wrong’ account (B) and adding it back worked briefly, but soon reverted back to same erroneous behavior.

For reference, you should know I use the same email setup on my Windows laptop in the Outlook application and I have NEVER had this problem there. I also have the Outlook mail app on my iPad with the same addresses and don’t have the problem there. I choose not to regularly use the Outlook app on Apple because I don’t like the general functionality as well as Mail, but switching is an option that’s looking more attractive. I just wonder why Apple can’t figure out the problem, but Microsoft has.

is there any hope this will be fixed?