I have that too. And my network is large (19 access points on Cisco Meraki) on a 260 acre property. I walk from point A to point B where the HomePod is and in the handoff of my iPhone from AP to AP somewhere it says f it and loses track. So when I finally get to point B room and say Ok siri lights on its like oh sorry i cant find your phone. I just completed my first organic test of this and so far I am glad to say Siri is 1 for 1. I might have been hearing things but she sounded a bit prouder than normal this time.