Yeti control chains problem up to which year of construction?

Hi together, I’m currently looking for a used Skoda Yeti and I came across an article at the ADAC (https://www.adac.de/…/) during my research, which says that the Yeti had problems with a long chain until 2015. In various forums, however, it is said that these control chains should be solved already from 2013. Does any of you happen to know a little more about it? From what year of construction is “safe” what these control chains are Problem? Had looked at a Skoda Yeti built in 2013, for example, yesterday, had directly “rattled” when starting (cold start). Thank you for your help in advance!!