Can't place item ghosts into proxy inventories.

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When trying to place item ghosts into an inventory via a proxy, it simply does not happen.

Mods to test it with:
https://mods.factorio.com/mod/SpidertronPatrols
https://mods.factorio.com/mod/orbital-cannon

You can't make requests via the proxy. my expectation was that it would place the request in the target entity, then show me the requests that are in the target.

For the orbital cannon it is an actual bug, because proxies are used to control access to the real inventory so you can never interact with it any other way, only via the proxy.