You are perhaps using an older version of OpenATV or they didn't upgrade the plugin to the latest version.
To avoid confusion between EPGImport and XMLTVimport I asked them to mention XMLTVimport in there log and it was done.
https://github.com/o...75636c2a0cb0a7c
You won't find this string in EPGImport:
[EPGImport] Trying IPv6 first:
The log you show if clearly a bug that happens in an old version of XMLTV import, so I guess that you should consider to upgrade your image and all its plugins.