Indeed. The problem was 10.15.4 to start with. One reason to roll out the supplemental update was because 10.15.4 broke Facetime compatibility with older iOS and macOS versions (which is particularly bad in the current crisis).
Maybe they shouldn't have released 10.15.4 right now, but instead only the security fixes in this release. But they had to push out that release to support the new MacBook Air.
Another problem with such reports is that it is hard to get an idea of how widespread this problem is. And whether the problem (perhaps) already occurred with previous Catalina updates, but is now picked up more.
Maybe they shouldn't have released 10.15.4 right now, but instead only the security fixes in this release. But they had to push out that release to support the new MacBook Air.
Another problem with such reports is that it is hard to get an idea of how widespread this problem is. And whether the problem (perhaps) already occurred with previous Catalina updates, but is now picked up more.