What are the key challenges of software testing and QA you have ever faced?

Following our recent poll on the top challenges of software testing and QA, we've come up with an article highlighting the key challenges and possible ways of overcoming them. How to deal with the lack of testing resources or major bugs in production? Follow the link to find out: https://medium.com/@okqa/what-are-the-key-challenges-of-software-testing-and-qa-you-have-ever-faced-edcd7cb51a20