The 'EMC Unity' server configuration settings has an attribute named 'OfflineBitFilter' which handles the behavior of offline files. This setting is by default set to 1.
It was observed in some environments that the EV placeholders were getting bulk recalled automatically, with 'OfflineBitFilter=1' setting.
Change 'OfflineBitFilter' attribute value to '0'.
This setting needs to be changed in consultation with EMC support.