S3 Upload Control `% complete` Display Goes Straight to 100%

======== TEMPLATE BUG FORM ========

Wappler Version: 3.5.5
Operating System: Windows 10

Expected behavior

When I use the S3 Upload Control element to upload a file, the % complete display should reasonably accurately reflect how much of the file has uploaded.

Actual behavior

It goes almost immediately to 100% and then just waits there until the file has actually loaded.

Best seen by uploading quite a large file on a non fibre internet connection which only has 0.6Mb upload speed as much of the world still has!