You can try MaxMiners site and see if you have the same problem:
https://maxminers.net/xcn/Can also use it as a backup site (or primary)
i tested it and, at this moment is worse then suprnvova
all the time stuck in some 1000%+ blocks, for now stuck in some 2 hour block ( big miners just left it, i hope they come back)
and i at this moment cant connect... error message: stratum subscribe timed out...
XCN really need some stable mining pool.... :-(
or maybe i have some internet provider problems or i dontknow.. ( i donthave conections problems when i mine other coins)