"Show all backups..." grayed out for VMware restores

Hello,

I was checking the backups of a customer and noticed that I can't use the "Show all backups in the specified date range" button for VMware restores, I can restore only the latest version of a VM.

For Windows or Standard policies the button works fine, so I select it and set the desired date, and so on it lists all versions available for restore, but even this way I can't select an old version and seems that something is wrong with the size of the incrementals.

The bpclimagelist shows me an apparently consistent list of backups but I would like to get the same information from GUI.

There is a way to 'unlock' the button? Am I missing something?

I'm running NetBackup 7.7.2 on a SLES 12 SP1.

Regards.