The visitors threw away a 2-0 lead before snatching a late point.
Falcons quarterback Kirk Cousins threw for 509 yards and four touchdowns.
Bayern Munich travel to bogey side Eintracht Frankfurt on Sunday looking to rebound having dropped points twice in the space of a week. Fixtures (1330 GMT unless stated) Friday Augsburg v Borussia Moenchengladbach (1830) Saturday Werder Bremen v Freiburg, Union Berlin v Borussia Dortmund, Bochum v Wolfsburg, Bayer Leverkusen v Holstein Kiel, St Pauli v Mainz (1630) Sunday Heidenheim v RB Leipzig, Eintracht Frankfurt v Bayern Munich (1530), Stuttgart v Hoffenheim (1730) dwi/dmc
Reigning Spanish and European champions Real Madrid have started the season below their brilliant best and this week finally tumbled to a first defeat since January.Girona and Atletico Madrid also suffered Champions League defeats on Wednesday and both are in action on Sunday, against tricky Basque sides Athletic Bilbao and Real Sociedad respectively.