Renaming files on the Android app adds a "-1" to the filename and removes their extension.

Device
Lenovo Tab P12
Operating System/Browser (if using the web)
Android 15
Dropbox App Version (if using the app)
440.2.4

When I try to rename a file, I see a second line which adds "-1" to my new file, doesn't matter what I do, I cannot get rid of it. Not only it does not make sense, but it has corrupted so many of my files as very often it rewrites also the extension, so when trying to rename documnet.pdf, it will rename it either document-1.pdf or even worse to document-1 NO EXTENSION. Then I have to download the file to my tablet, open it via my local file explorer, add ".pdf" extension and then I can use it. 

Today I upload a WORKING pdf file to dropbox, and without renaming it, it removed the extension, so I was unable to send it via email or whatsapp to other people, I couldn't do anything with it, and the worst thing is that I cannot do such an easy job as rewriting the FULL name of the file whatsoever as this app for a very strange reason doesn't allow rewriting the extensions for me

I know I am not the only one, because recently a pdf file was shared in a group chat of my colleagues and nobody was able to open it after downloading it (whole thing was outside dropbox), when I donwloaded it it was called "file.-1" , I asked the person if she uses dropbox and she confirmed, but she didn't know that your program can corrupt our files.