I took a look at the Domain registration WHOIS details for xmr-wallet.org and it doesn't look good, im afraid.
The domain was only registered on 31/10/17 and the DNS servers are hosted in Russia - NS1.FIRSTVDS.RU
Here's the info..
Name: Stefan Dorner
Mailing Address: Pfarrgasse,, Rattenberg Rattenberg 6240 AT
WHOIS Server: whois.registrar.eu
Registrar: Hosting Concepts B.V. d/b/a Openprovider
IANA ID: 1647
Abuse Contact Email:email@example.com
Abuse Contact Phone: +31.4482297
Updated Date: 2017-10-31
Created Date: 2017-10-31
Registry Expiry Date: 2018-10-31
I'm guessing Stefan Dorner is a bogus name.
You may want to add this to the issue on Monero reddit https://www.reddit.com/r/Monero/ as well, to see if anyone knows anymore, plus I would contact Monero devs directly - Or hopefully they will check this soon.