My Tele Rolleiflex never had a hint of any separation. The glass was immaculate and the pictures from the Sonnar lens were too.
But after owning it for many years it developed this classic type of separation quite quickly and it did impact images quite significantly, causing a lot of vignetting.
I emailed Kanto Camera on the prospect of repair but I'd sold the camera for parts by the time they replied, many months later. The cost to attempt recementing the elements was more than the camera cost, at that time at least.
I'd abolutely love another. There is simply no camera like it for me. But every time I get the urge and start looking online I see so many with this exact type of separation that even if I could find one without it, I wouldn't place much stock this 60 year old Sonnar lens is going to last too long 🙁