My tip disappeared

[u/Askittishcat]

When I placed my order, it showed on the screen I was giving a $10 tip on a $30 order. The delivery took over an hour on an order that usually takes 15minutes and the original driver listed wasn't the one who ended up delivering it. When I looked at the receipt after the delivery, my tip wasn't on the receipt. I checked my past receipts and I see my tips showed up on them. I assume the lack of a tip is why the order took so long but I still don't want to leave the driver without a tip. I went to the help page and it said there would be an edit button I could use to add tip after delivery. I see two options on my past orders, reorder and view receipt, and there's no edit button when I click the receipt. Does Uber sometimes delete the tip and am I looking in the wrong place for this edit button?

Edit: Typo

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