HomePod has trouble connecting to new iPhone

I recently bought a new iPhone 17. My HomePods (all running the latest version, 26.0.1) work fine with it, unless I leave my apartment. When I return and try to do a personal request, along the lines of "Hey, Siri, add eggs to my groceries list," I get a response saying "I'm having trouble connecting to iPhone." If I quickly put my phone in and out of airplane mode, resetting my wifi and cell connection, I can then repeat the request successfully. Any idea why this behavior is happening, and what I might do to fix it? I've tried resetting network settings on my phone, restarting wifi, removing and re-installing all my HomePods using my new phone, all to no avail.