This is still massively broken.
The UX when assigning a category to payments also got worse after the update - changing a category now features two mandatory taps, with the annoying "only this payment" or "all similar payments" pop-up every time.
Also, can anyone tell me what "similar transactions" are? I can not reverse-engineer the logic, and it doesn't seem like it's on a per-merchant basis, neither does it look like it's done based on amount, day of the month or description.