my dwarf pool monitor page shows the same thing but my miner is showing me I am connected to EU server and still submitting shares as normal with roughly the same 68ms per share.
I'm wondering if I should just leave it running or move until seems to be resolved.
I am mining as usual, shares are accepted and no rejects.
Looks like just Web backend died, it happened before some times.
Not so good for sure to mine without stats, but everything was recovered and recalculated.
Your decision to leave or not, but I think no reasons to worry much based on past experience.
Anyway I am not Dwarf-related so can't guarantee anything.
I'm staying, as you say its showing all shares as accepted as normal.
I have emailed Dwarf to let them know about the problem so hopefully we will have stats back shortly