Thank you very much for your response. The detail is appreciated
Also found (didn't realize) that there are graphs of that show both personal, and total pool, production (available in the web portal) . So by checking that was also able to verify that the dips were pool-wide and not just for me.
I think I'm going to try my luck in a different pool as this one does not seem very steady (currently the entire pool-x.eu pool is actually down and has been for about an hour.)