Attachments are duplicating

[Android Central Question]

Some attachments are duplicating in my inbox. That is, sometimes when I open an email, the same attachment appears 50 to 100 times. One email had the same attachment 2,200 times. It only happens on my phone (S9) using the Samsung email app. Not the Gmail app or my desktop. They are still attached when I forward the email. It is using up all my data, and other people's data!