Progress is jumping back to 0 during compression in Chrome

[soldag]

When logging the progress I realized that after some time it starts to report from 0 again. I had this issue in Chrome 87.0.4280.88. Also tried Firefox, but it was working well there.

To reproduce the issue you could just select a large enough file in the demo page and observe the progress.

Here are also some progress logs from my test:

time: 1608657326624, progress: 5%
time: 1608657327351, progress: 10%
time: 1608657327351, progress: 15%
time: 1608657327388, progress: 20%
time: 1608657327388, progress: 5%
time: 1608657327902, progress: 10%
time: 1608657327902, progress: 15%
time: 1608657327993, progress: 20%
time: 1608657327994, progress: 25%
time: 1608657329092, progress: 30%
time: 1608657329621, progress: 77%
time: 1608657330024, progress: 90%
time: 1608657330386, progress: 96%
time: 1608657330709, progress: 99%
time: 1608657330709, progress: 100%