Source AUDIO playback sluggish or won't stop playing when full screen.

[tom141014]

Playback starts on spacebar depress, but doesn't stop when I hit it again.  I can see it continue rolling for an additional quarter second or so.   If I toggle it back to less than full screen, it stops instantly when told to.

Sometimes playback won't stop at all no matter what I do.  I sometimes completely lose control of the app, until it reaches the end of the clip.   Keyboard and mouse won't interact with it at all.

Sometimes I then go to quit the app but it crashes in the process.

This only seems to occur if the source monitor is toggled to full screen.

In Premiere, I have...

• trashed preferences
• gone to Mercury playback engine only
• turned mercury transmit on / off (it was on previously)
• switched audio input default to "none" (read this somewhere)
• via the Finder, emptied the media cache and media cache database folders
• relinked, then replaced the media file

At the Mac level, I have...

• restarted
• reset SMC

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Premiere Pro 2018 v12.1.2

Macbook Pro Retina 15" (mid 2014)

16 GB

NVIDIA GeForce GT 750M (though I'm pretty sure this has never been used by Adobe; another $500 down the tube)

El Capitan 10.11

[Vidya Sagar]

Thanks for the detailed post, tom141014. Few users reported this issue earlier.

Are you using multiple monitors? If so, disconnect other monitors and see if the issue persists. 

Have you connected any external video input device like a webcam? If so, disconnect it and check the issue.

Also, check if the issue occurs in a new project.

Vidya