Very serious bug in latest iOS

There is a very serious bug in the pdf app of the latest iOS. It’s very simple to reproduce:

1-on files, click “scan a document”

2-scan page 1

3-scan page 2

4-click save

5-open the pdf and go ahead dragging page 2 up so it becomes page 1

6-the pdf appears fine at the moment, page 2 is now page 1 and page 1 is now page 2.

7-click “ok” and reopen the document 

8-now page 1 is completely gone and both pages are a copy of page 2. You just destroyed page 1!

I’ve lost important data due to this bug. I went ahead reproducing it multiple times afterwards and it causes the same result every single time.