Invisible (CA) interview questions

I was approached by an Invisible recruiter about the role, and made a formal application for the position of AI Trainer . The first part of the process went quickly and over a period of a week I completed a series of tests online, including an English language assessment, Cognitive reasoning assessment and an AI interview. These took a lot of time, but as I seemed to be progressing through the process, I was happy to make this commitment. However, after completing the AI interview, the whole process stopped and I didn't receive any further correspondence from the company. I chased the recruiter that had originally approached me, but just received some confused messages. Finally after reaching out to her again after 6 weeks had passed I was informed the project was on hold, with no thanks for my time and efforts.