Ordered 5 T-shirts on eBay and checked out on normal Monzo card.
I then flexed the amount to go over 6 months.
The next day as items were dispatched I was charged per item as they were sent, rendering flex null and I’d now end up charged twice
Details to reproduce
Order a few items under £30 on a site like eBay, pay for full amount by debit card, then flex the amount on Monzo App, over the next few days as items are sent out you are charged per single item and still under your flex obligation.