Subnet interface unable to stock items from a subnet storage bus kissing a mainnet stocked interface

[infant-crusher]

AE2 version: appliedenergistics2-rv3-beta-357-GTNH
in an attempt to only pull resources as needed from my mainnet, i used this setup
this is a mainnet interface

this is a subnet storage bus kissing the main net interface

this is my subnet storage

and this is the sub net stocked interface

the expected behavior is that the subnet interface should be able to stock from the mainnet interface (if you replace the mainnet interface with a chest, it works, so logic follows that this should work as well.) this was in 2.6.1, but i also tested it in the newest beta release and the result was the same.