yeah, i just had this same problem with TWO attempts of labyrinth. started one, got into first battle, stuck on "engaging battle"... 3 minutes later still stuck on engaging battle. refreshed and went to resume and wow, stolen labyrinth attempt, NO resume option.
so, started my 2nd labyrinth attempt and guess wat, same rubbish AGAIN, stuck with engaging battle, refresh, and AGAIN, no resume option, so lost BOTH attempts on labyrinth and wasted the stamina as well. and the worst thing is, i need to get labyrinth done to get the beginer rewards.
this happened on ice of skathi server 55.
to be honest, this game is getting worse and worse every time i play it.