Resolve 15.0.0B.032 on Mac HIgh Sierra - import media issue

When trying to import media with multiple video files selected, only one file will import intact. The rest will only import audio, if I'm lucky enough to get them to import at all.
The curve ball is that if I issue a cmd-Z to undo the import, and then repeat the import, all files are brought in intact.
The curve ball is that if I issue a cmd-Z to undo the import, and then repeat the import, all files are brought in intact.