Pools might have some minimum threshold of shares before they kill a connection… purely to allocate bandwidth/resources on their side. Not sure.
Have you tested a single Bitaxe with any other pool?
Running Bitaxe for 2 days and once in 24 hours on the nostr:npub1qtvl2em0llpnnllffhat8zltugwwz97x79gfmxfz4qk52n6zpk3qq87dze dashboard it shows that it’s offline 🤷♂️ It’s already happened twice. But on my end it’s connected and hashing. Any ideas why it’s happening? 
Pools might have some minimum threshold of shares before they kill a connection… purely to allocate bandwidth/resources on their side. Not sure.
Have you tested a single Bitaxe with any other pool?