Only Pokémon that is lended are restored back to your account without any changes. (Such as EV, IV, Levels, Evolution)
If you lended an Pokemon with a hold item though, if the Pokemon isn't the holding the item while the other user you lended to is using it, you will not receive the item back.
So unless you have any proof in regards for a set contract on how you wish to received the Pokémon during after the Lend Process, staff members can not assist as far as I know.
If you do have any trade issues with proof of evidence, you are free to make a report under the sub-board linked below.
https://pokemonrevolution.net/forum/index.php?forums/report-center.39/