Expanse block explorer seems not working correctly.

http://www.expanse.tech/explorer/
is saying that last block 60053 is found 3 minutes ago.

Actually miningpoolhub and dwarfpool is mining at 600294 block height
Bittrex's expanse wallet is on same chain too. Transactions confirmed correctly.

Network forked at 600000? Or just expanse block explorer not updated to latest wallet?
Seems very few miners are hardly finding blocks at old chain.