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Why would they design the system in a way that enables an app (Microsoft Teams) to interfere with emergency calls?

I know this part is supposed to be fixed, but it's insane that this was part of the problem.

It is possible to intercept a lot of Android system broadcasts. In the B2B world, we often had weird requests to take over the whole phone experience and do something different – made possible by the same core Android APIs that they ship both to business devices and personal devices.

I'm also not surprised to read that Teams was to blame, because Skype had the same functionality back in the days.

Teams is a telephony app, so perhaps Google's dialer tried to route the call through it and reacted incorrectly to failures.

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