Hi there.
Just sharing is caring this.
Updated my machine for testing purposes to 10.14.0 and like also in the BETA's our Carbon Black Defense sensor is not working on 10.14.0 and gets in Bypass mode.
My first suggestion was that it was an KEXT not correctly loaded or something in that way.
With some help, discovered that it is just the CB Defense sensor that is not 10.14.0 compatible.
Check below for version information and compatibility, after i installed the beta it directly got out of Bypass mode.
Supported sensor and agents
Beta Sensor
Cheers