UiPath Senior Software Engineer interview questions

The recruiting process is split in multiple phases. First phase was a Hackerrank test that contains 3 problems and you must solve 2/3 problems. Also, [theoretically] you can choose what programming language you want to. My test had a platform issue at 2 from the 3 problems: - at first problem I was not able to choose Python as programming language - at the second problem the checker did not work as expected. In the statement of the problem was said: "the order of the info from output does not matter", but actually it was. I just gave them this feedback and their gave me an aggresive answer: - for first problem we will take care of it - for the second problem some testcases really failed, the number of lines was different. It was, but I lost a lot of time trying to understand why the ones with the same output, but different order still failed. But it did not matter for them :) - for the third problem, my solution was not optimal enough. In the end my question remains: how could I possible solve 2/3 problems when they had a platform problem at 2/3 problems, so only one was actually actionable?