I had issues with the new OBS - on a high spec PC frame rate during 45 minute live Facebook video dropped to just 3fps!!
On a Mac-Book later a friend was utterly unable to connect to a custom server (Moment House) and when he gave that up and went live on Facebook it was dismally bad video quality
Both the above previously streamed 60fps at 1920x1080 with no issues on V25.0.8 and 25.0.7 respectively
After searching around the OBS site I finally found a disclaimer saying V26 is a test version and if you are using OBS for broadcasting to us the last known stable version..