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it is an issue on Poloniex's end or BitShares? Have they removed wallets without warning in the past?

They started to have problems with BitShares already 8 days ago. I even made a post about it.

https://steemit.com/poloniex/@scorer/poloniex-problems-with-bitshares

Yes, they have disabled BitShares already in the past for many times. I counted at least 3 times and none of them was some kind of error that was discussed in github repository. Even once it was posted there but no info from Poloniex side.

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