Windows Electrum 1.9.8 is not synchronizing since blocks 317843

[bitofc]

I have tried deleted both blockchain_headers and config in AppData/Roaming/Electrum folder, but it still stuck here.
I have try uncheck the auto-connect, and select different electrum servers, but it still stuck in the same block 317843.

I have added some of the public address as watch wallet in blockchain.info I can see my miner is generating BTC from p2pool, which of course cannot be seen in my Windows Electrum client as it is not able to synchronize to Electrum server.

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[bitofc]

I forgot to add the issue was resolved.
After I made a backup with my wallet.dat, I deleted it then start the electrum and restore my wallet using the seed.  Everything is ok now.
Apparently it was wallet.dat that had issue, I guess.