The problem is nothing more than what is stated in the title. Jdownloader 2 won't just download some (not all) of the files from disk.yandex.net.
Here is my log:
23.03.21 19.46.23 <--> 23.03.21 19.49.46 jdlog://4249725302851/
Note: I had written another topic for my problem about disk.yandex.net. That was a hoster problem. But the day after someone fixed it, my downloads weren't able finish. They had gotten into such an infinite downloading circle that I have seen a single .part file taken gigabytes of place. I hope It won't be again.
Thanks!