This post was composed after first learning of this incident from:
I tried to warn you, months ago... #10820
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Sure. It's no fun to suddenly have >10M missing from your wallet.
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Here's the Tweet that starts this thread:
Fellow LND node operators:
Do not use unconfirmed funds to open new channels for now.
Due to a bug in LNDs coin selection process you might end up funding that channel with already spend coins, borking your balances.
Please retweet for visibility.
And the issue in the Github repo for lnd:
lightningnetwork/lnd - Lost anchor: stuck sweep transaction (unconfirmed balance) #6241 https://github.com/lightningnetwork/lnd/issues/6241
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