I’m manually transferring funds to my gas envelope. I pretty much always pay at the pump and “swipe” in the app to connect my debit card to the gas envelope prior to inserting my debit card in the card reader.
After inserting the debit card in the reader, I’ll see a transfer from the gas envelope to the Cash envelope and an authorization in the Cash envelope for $75. Let’s say I purchase $35 of gas. The $40 difference between the authorization and what I actually spent at the gas station remains in the Cash envelope and isn’t returned to the Gas envelope.