I am testing out Google Voice for Workspace and it dawned on me that calls that come in while I am on the phone are just going to voicemail and I get an email about a missed call. Is there no call waiting feature in Google Voice? I figure I must be missing something because I can't imagine Google Voice not having call waiting as a built-in feature. Every VOIP service I have ever used has that as a default feature.
@ThatGuy check out https://support.google.com/voice/thread/17563890/call-waiting-no-longer-working-can-no-longer-put-on... and see if that helps with your issue. -KAM