With so many bugs, the so called "New Teams" should not be advertised as a free upgrade to a new stable version, but should stay as beta or even alpha version and offered only to limited audience of beta testers.
Teams is used in millions of business meetings and it is embarrassing to have such basic application failures in the middle of presentation.
Microsoft should keep its old best practices of promoting stable applications to mainstream users of their applications and keep unstable and super new versions to limited number of volunteers for beta testing.