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I don't know if it's the extra card or version 1.62 CUDA 11.5, but I'm getting a LOT of duplicate share rejects from 2miners now.
Are your clocks too high? 1.62 does have a stratum change in the code, but 2miners is not affected. Only pools that are using the ETHproxy protocol. hiveon.com / ezil.me and a few others.
i still got this message..


This message can come if your internet connection is unstable.
I posted an issue report in Github; will update as I find out more. But it seems to only be happening across my Nvidia cards.