In brazil Keysight has a office (and a cal lab) in Barueri (Sao Paulo). I don't thing this is a third part.
Thats bad news, really bad. That's exactly the office I'm dealing with and I really expected them to be some 3rd party company which would certainly help me understand such a poor service. Not good.
Just wait and decide. Even if they use the name it can be a local company with an exclusive distribution agreement.
But given the reports of malfunctioning scopes it's clear that there's some isssue they must address. I remember the old bad capacitors issue, which was even worse for idle equipment, which was a real disaster for shops with back up equipment sitting idle. When the main equipment broke, they promptly replaced it with, sadly, non-functional backup units.
Apart from a good experience I had with Sony in 90's, recently I had an atrocious experience with a well known German manufacturer of aquarium equipment (Tunze). One of my movement pumps stopped working a month or two after the warranty expired. As I didn't have any electrical problems (I know, and I had two identical units, just one broke) they claimed that they wouldn't consider warranty service and that probably a snail had gotten stuck, blocking the pump. I had checked it thoroughly and there was no mechanical trouble. Besides, they proudly state that they have an effective electronic protection which, with a consumption of less than 20 W, is not exactly rocket science. So, in case a snail caused trouble, the protection didn't work at all.
In my case, the local office (a distributor) refused to do anything, and when I contacted the manufacturer directly, the answer was similar, followed by an angry message from the Spanish distributor. So I told them to dispose of the broken pump and of course the brand is in a proud position in my black list.
The local office is authorized to refer to themselves as Tunze Spain, and it's a distributor with an agreement. Although in this case the "mothership" was similarly unreliable.