I get maybe a dozen calls per week that become 2 second hangup voicemails. It's been going on for a few years. Mark the number spam in Google Voice, but I still

I get maybe a dozen calls per week that become 2 second hangup voicemails. It's been going on for a few years. Mark the number spam in Google Voice, but I still get a voice mail notification on my phone for those numbers unless they're also blocked. But it's a different number every time, endless.