But even after Apple discovered the widely publicized eavesdropping glitch (from a teenager), temporarily disabling the feature until a bug-fixing OS update was finally rolled out, it doesn't seem like the company's troubles are completely over. That's because Group FaceTime calls are still not working properly for all iOS users on the latest platform version, as reported by MacRumors.
The newly unearthed issue is far less controversial than that spying bug, fortunately, impacting the security of your iPhone or iPad in absolutely no obvious way. Basically, quite a few folks on Twitter and a couple of forums are saying they can't switch from a regular FaceTime call to a group video chat, as the option to add people to already initiated calls appears to be disabled.
After doing a little digging and discussing with several customer support representatives, a MacRumors forum user purportedly found out the issue is known to certain "senior" Apple advisors and, presumably, engineers already working on a fix. Official Apple Support Twitter account handlers are also aware of the limitation, suggesting users they start their Group FaceTime sessions with "at least two additional" people.
In other words, the feature itself is functional, but for some reason, the "add person" option doesn't work as intended. While definitely inconvenient, that's not exactly a critical bug, so we may have to wait a little bit for a proper, complete Group FaceTime repair.