Also subways, and people with cheap data plans that get throttled after 1GB. Google maps regularly says "no results found" because the connection times out.
I’ve found Google Maps to be one of the worst offenders, often getting in a pickle when my phone is switching between 4G and 5G. What’s frustrating is that the state it gets in is irrecoverable: the only thing that works then is force-quitting, then reopening the app.