Replacing a file in Export Audio Mixdown (OS X issue?)

I sometimes get a garbled file if I replace an audio mixdown with one with the same file name. I get the usual OS X warning ‘File already exists’ and click Replace. It’s just happened with couple of MP3 files, in both cases the new file contained a glitch at the end with an extra bit of audio, probably part of the original file. The workaround is to delete the old file in Finder before exporting the new one.

Not sure if this is likely to be a Cubase issue or OS X?

Anyone else seen this?

Probably not a Cubase issue. I have not had this problem with Win 10.