fishy URL of Abyss Web Server X1 2.11.1 / Opera 12.18 / Opera 9.64

reactOS 0.4.7RC1
I noted for many release tests now that "Abyss Web Server X1 2.11.1" configuration WebUI had issues with Opera 9.64, but worked fine in other browsers like Opera12.18.
That's how the issue appeared to me in the past (e.g. ros 0.4.5rls).
I was happy to see it working in both browsers in 0.4.6RC1 and thought, hey: maybe it's fixed.
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For my 0.4.7RC1-test I noticed the issue came back and now both browsers had issues, so I was totally confused and observed a bit more in detail what happened:

The correct URL where the servers configuration interface shall listen is:
http://127.0.0.1:9999

When I take Opera 12.18 and enter
http://127.0.0.1:9999/console/language
it will automatically reverse the IP-adress to
http://1.0.0.127:9999/console/language
and will properly show the page.

When I take Opera 12.18 and enter
http://1.0.0.127:9999/console/language
it will automatically reverse the IP-adress to
http://127.0.0.1:9999/console/language
and will not properly show the page.

Opera12_18-canLoadPageWithAmbiguousURL.png
Opera12_18-canNotLoadPageWithCorrectURL.png

2k3sp2_ok.webm does not revert the IP using the same binaries.