I discovered today that there is an issue when using Kaspersky Firewall and HTTP Uploads. Kaspersky is caching the uploaded file and returns to the client that the upload is already finished. In TFU/JFU this causes that the progress bar goes to 100% very quick.
I will add to the next update that the speed of the upload is checked. If the upload is too fast then a message is written to the flash. So the user knows that the upload is maybe not finished yet. I will then try to ask the server directly if the file is already there and tell the user when this is the case.
So if someone has this problem you have to disable the “transparent proxy” of kaspersky. And in the new Update of TFU/JFU this problem will be detected as well.
Here you find how to configure your firewall properly: