https://www.nasa.gov/sites/default/files/atoms/files/webb_ir...
To name a couple other problem spots: They have trouble getting the shield to deploy on earth: https://arstechnica.com/science/2018/02/analysis-finds-james...
The IR detectors were replaced in 2015 because they were deteriorating in storge. Now the new detectors are 6 years old: https://optics.org/news/6/2/35
Even the 26Ghz downlink radio that can only be received the the 3 huge Deep Space Network dishes on earth is an experiment.
I really REALLY want the Webb to work, but I would take 10:1 action against.