near-sdk-rs: view call fails trying to call to attached_deposit, but nothing in the contract seems to be looking at the attached_deposit

I have the following method in my contract:

#[near_bindgen]
#[derive(BorshDeserialize, BorshSerialize, PanicOnDefault)]
pub struct MyContract {
    ...,
}   

#[near_bindgen]
impl MyContract {
    ...
    pub fn is_account_whitelisted(account_id: &AccountId) -> bool {
        Self::account_task_ordinals_map().contains_key(account_id)
    }

    fn account_task_ordinals_map() -> LookupMap<AccountId, Option<u32>> {
        LookupMap::new(b"o".to_vec())
    }
    ...
}

is_account_whitelisted is intended to be used as a view method. I then later use it from near-api-js in the following way:

    window.contract = await near.loadContract(nearConfig.contractName, {
        viewMethods: ['is_account_whitelisted', ...],
        changeMethods: [...],
        sender: window.walletAccount.getAccountId()
    });
    ...
    window.contract.is_account_whitelisted({'account_id': window.walletAccount.getAccountId()}).then(m => console.log(m));

and it fails with

...
FunctionCallError(HostError(ProhibitedInView { method_name: "attached_deposit" })).
{
  "error": "wasm execution failed with error: FunctionCallError(HostError(ProhibitedInView { method_name: \"attached_deposit\" }))",
...

Do I need to annotate the method in some way, am I not calling it right, or is there something that I use in the method that causes the call to the attached_deposit?