Non unique keys generated for unique files (uppy/tus)

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Initial checklist

• I understand this is a bug report and questions should be posted in the Community Forum
• I searched issues and couldn’t find anything (or linked relevant results below)

Link to runnable example

No response

Steps to reproduce

1. Create three directories e.g. dir1, dir2 and dir3.
2. Create a text file "test.txt" in each directory
3. Open all text files in a text editor with "save all" function.
4. Change the text of the files to be "test1", "test2" and "test3".
5. Save all
6. Try to upload each of the files, one by one. The second and third will not be uploaded because the key that is generated for them is exactly the same as the first (presumably, it ignores the content and is only concerned with the last updated timestamp and the size).

Expected behavior

Keys should be unique so that all three files can be uploaded.

Actual behavior

Only the first file is uploaded.