I have a similar experience woth my 3 miners. I see no issues with miner side logs but at times ocean shows them momentarily at 0. I think its an issue on their end and i have no idea if its just a display issue, or an actual deficiency in their pool receiving shares submitted by miner. Or perhaps their analytics are more accurate than other pools that smooth out their data reported back to you ( if any ) ? 🤷‍♂️ perhaps all miners have moments where they deliver 0 work

Anyways i dont think its a problem with your bitaxe, imo