Just something I noticed that I thought was worth mentioning. At times when eAuction stops working, it's generally when the bot is at the AH. When it does stop, it only stops because it's too far from the Auctioneer. If you move him up closer, he springs back to life. Might be worth changing the path of the bot so it goes to one of the auctioneers on the sides, so it can move in close enough. Hope that makes sense.
There is no log that can show this particular problem. It's been there for MONTHS, i reported it myself before. It just stands there and says nothing in the logs. You move the toon 1 yard, and it's kickin' again. When i used to use eAH it would happen once out of every 3 runs to the ah, but it's surely there!