Audio mixdowns exported from Cubase/Nuendo (File > Export > Audio Mixdown) contain silent gaps.
The problem is still being investigated. Apparently, the gaps in the audio mixdown occur on some systems when audio is exported directly to exFAT-formatted disks. This seems to be the case with macOS 14 in particular.
Please use a differently formatted drive.
As soon as we know more about the issue, we will provide further details here.