Issue Regarding Large Image Loading in "basically-streams/examples/fetch" Example

[liwakin]

Hello, I was trying out the "basically-streams/examples/fetch" example and noticed a potential issue. When loading the three example images, the largest image is not read from the disk cache after "fetch", but is loaded again. This means that the progress bar does not accurately reflect the loading progress, as the image is actually requested twice, and the progress bar only displays the progress of the first request. I wanted to ask, is this the expected behavior?