Ugh. 10 hours in and Ant1 fell to 411Gh at 218 and Ant2 fell below 400Gh as expected. I wish Bitmaintech would include an option to auto-restart in the firmware. Thinking about creating a small cronjob to do just that...
I am having very similar issues. Starts off ok but hashrate sinks later. What sucks is that its impossible to tell when it will sink, sometimes soon, sometimes it runs fine for hours. But once it takes a dive it never recovers. I have seen it go 7 or 8 hours after a reboot with a good rate and then tank so bad for the next 2 or 3 hours that it just kills the total average to below 400. Pool side graphs tell the same story. Something happens and it just chokes.
One possibility I have been pondering is a batchfile using plink. Should be able to store credentials and insert the one command you need which is reboot. Set that as a scheduled task and you should be able to reboot whenever you like. I see the scheduled task tab in the miner but not sure how to use it which is what I guess you are talking about.