currently KeePassSync store data in us standard region. I would ask you to expand data storage feature to all regions eg. Irleand , Singapore etc.
Currently KeePassSync gives an error when using existing bucket in other region than us Standard (see attached file). I don't know that this issue is really proxy related.
Anonymous
adding right error info from app as attachment
error showing when using other region than us standard
ZqSCVn glbsjzrnokrk, [url=http://xwpdriyajmpa.com/]xwpdriyajmpa[/url], [link=http://dwkafeelrehc.com/]dwkafeelrehc[/link], http://ienzeikxodkr.com/