Zingo Android shows excessively high balance when change note is tied up in the mempool

[AArnott]

My wallet is in a state where its largest note is tied up in a mempool transaction that won't mine, probably because of insufficient fee. This transaction was created with YWallet. Opening up Zingo Mobile on Android, I see the most peculiar thing. It's showing me nearly double my real balance in ZEC. In the Send screen, it tells me "Some funds still confirming or syncing". I'm fully sync'd. And it tells me my full real balance is spendable.

My guess then, is that it sees the mempool transaction, and is adding its change to my current balance (without having debited the spend note from my balance first), thereby nearly doubling the real balance.

(later) My transaction was finally mined, and sure enough, Zingo Mobile is back to showing the correct balance in the send screen instead of nearly double.