Error on first try to download my world

When I want to download a world from my realms, I get an error, then when I try again the download works. It always takes two tries to successfully download it.

Steps to Reproduce:

1. Click on "Modify the world" on realms manager.
2. Click on "Download the world".
3. Wait 10 secondes.
4. Get an error.
5. Try to download again.
6. The download starts instantly.

 Observed Results:
We get an error on the first download attempt.

Expected Results:
The download should start on the first attempt.