Canonical interview questions

At first there was an initial screening call which took about 30 minutes where I've been told about the position, company and the project. Then I've been sent task to create a CLI Python tool for scanning and downloading some Debian mirror files and short report - takes around 2-3 hours I'd say. After this I've been invited to what I understood was a technical round. It took around 25 minutes and I've been asked some quite regular questions about things like threads, processes, ssh, understanding Python code, etc. I made notes throughout the call and only thing I couldn't answer was where to find server log files, out of all other questions. I was pretty excited after this part, because I was pretty confident I knew about all the topics they asked me about, plus the position was advertised as junior level and I already work with the cloud at my current position and have 3 years of Python experience. The next day I've been called by the recruiter who signed me up for that position that it's a "no". Later on I've received an automated email that they've chosen someone else. This was very confusing for me and I don't understand why did the process move forward so well then cut unexpectedly. Beware.

I applied online and after a week or so I received an email saying that I was selected to advance to the next stage and that the process would start moving much faster from now on. The next stage was a take-home technical test that shouldn’t take more than a couple of hours and it was just to gauge some of my capabilities. I found a bit odd to jump into a coding test before an initial call with someone from HR/Recruitment, but nevertheless, I did the test. Two days after I submitted the test, I received a template email saying that "Competition for jobs at Canonical is always strong and we often have to make difficult selections between exceptional candidates. At this time we have decided not to take your application any further forward.". Zero feedback whatsoever about the test and why I'm not progressing forward. Very unrespectable - if you request someone's time to do a test, you should invest some of your time in giving proper feedback.