With lots of family trips coming up this summer, I am faced with spending quite a lot of 'quality time' updating API for the wife and kids on each individual booking, compounded by various complications of singles rather than returns, a mix of revenue and avios bookings on different PNRs, five going but only three returning etc. There seems to be something new in MMB whereby it can take a minute or so to upload the information passenger by passenger, including a new pop-up while it churns. All rather tiresome so last night I instead went into each of the online accounts of the kids and updated their profiles with the relevant passport information there, expecting it to flow through this morning into all the bookings. It has not. Will this eventually work, will it never work for bookings created by me and selecting my HHA members, or will it work only for new bookings?

Thanks!