I've had major issues with CC 19 and it made me pull a 48-hour edit session to find workarounds before a major event. It seems like Essential Sound is really buggy. Clips I used audio effects on would randomly change their volume. Color correction using REDGIANT would randomly turn greenish and couldn't paste attributes on the same clip without a different result. It took 10 seconds to play after hitting spacebar. Now audio is switching between clips... Interview 1 has the sound of interview 6.
I'll never upgrade to the latest version before starting a major project again. Adobe really needs to fix the bugs, I basically can't work anymore without spending hours exporting unaffected sections to ProRes and then cutting them back in.
I have a fast MacPro so pretty sure it's not the issue and I'm still running High Sierra.