Saving Mp3 error

I'm not sure whether this is a bug, or just a setting I'm missing somewhere, so thanks for any advice. 

Here's the issue: often (like more often than not) when I record a file and choose to save it as Mp3, I get an error pop-up that says "An error occurred when saving the file to disk. The destination may be full or no longer available." I can confirm that the destination is available and not full, it happens regardless of the destination, and this error never happens when I save as WAV to the same destination, only when I'm saving as Mp3. And if I click "ok" and try again with the same file name and destination, it saves just fine, sometimes even asks if I want to overwrite the file it just told me it couldn't save. 

For reference, I'm running Audition CC build 23.0.0.54 (but this has been an issue on any version at least as far back as October, when I started needing Mp3 files more often) on Windows 10 Pro. Not sure what other information would be helpful here, but happy to provide whatever might give me some answers. 

Thanks in advance for any suggestions!