Thank you for your post and sorry for the delay in responding.
GFS media pool is designed as an archiving target with a thought that you have a scope of source backup jobs scheduled differently. That is the reason we have an advanced waiting logic and no exact start time for the job (basically GFS job is running for the whole scheduled day and awaits for new restore points)
Therefore i request a feature which allows you to tell veeam to ALWAYS only copy the latest FULL backup to tape.
This option is available only for simple backup to tape jobs (pointed to simple media pool). GFS job takes the full backup for the set date or waits for this restore point to be created during the scheduled day. If no luck, it goes back in time to find the proper replacement with a thought that this restore point was not archived by this GFS job before. This restore point could be a previous full backup or an incremental restore point, but in this case synthesized full backup is going to be created.
May I ask, have you tried using the simple backup to tape job instead?