http://www.ejinsight.com/20180406-hk-engineers-raise-concern...
There are many more, but the fact that engineer's safety concerns were side stepped rarely sees light of the day after disaster strikes. Also it doesn't have to be a catastrophic failure. Sometimes the reduction of life span of a structure is cause of not taking care of all the concerns.
Also this does not stops with construction. Have you not heard about problems in cars or other engineering projects where safety concerns were ignored. If not, I have to ask you how old you are.