Honestly this is very unusual. Because they should have asked for a fresh passport scan and photo before passport request. And now they seem to be rushing this thing. Do they have a reason to do so? You seem like a very frequent international traveler. And I am guessing hey have knowledge that you were travelling even when submitting te form? That may be the reasn for a fresh passport scan request.
In present circumstances the only thing you can do is upload the latest passport scan page available and latest photo. And if it's possible upload a fresh letter of explanation too, mentioning passport scan is not latest but that's the best you can do as it is with them for processing.
All in all, I don't think they will reject your application this way. Afterall you aren't not hiding anything, your passport is with them and they can check anything they want. It may delay the process a but but that should be ok. Just fulfill the technical requirement, that is submit the passport scan and photo.