Email Application Not Responding - Is That the Worst Kind of Data Loss Problem?

Email has a no error rate of like not sending their email. If the app crashes, they will always send it when the app is opened again. So I could send an email and then if I open another application into split view, whilst the email is sending everything crashes. Sometimes I can just leave it there and the app will just crash. And this has been annoying. It's concerning. A couple of days ago, I opened an email and it sent every email in my inbox to the archive. Now I don't know why I did that. But here's the problem. That kind of error is the like, Nope, I'm gone.