Cause has now been identified.
After contacting SAP and sharing some log info, seems that this affects views whose name begins with any other than a-Z character.
Seems the SQL behind the scenes is not wrapping names in appropriate identifiers.
Note: our repo is in SQL Server - I assume other platforms may behave differently.
Workaround is to rename and avoid offending naming convention.
A proper fix is promised ... no idea when.