Wadhwani Institute for Artificial Intelligence interview questions

Honestly, I don't even know which role I interviewed for. I had filled in a basic Google Form and had three calls. One was with the HR, the second was with a panel, a third was with the founder. It looked like they were mass hiring for a range of roles on a new project. About a month after my call with the founder, I had a final call with a project manager. I wasn't sent a JD despite several requests for the same so I got to know what I was being recruited for only in said 4th round. Earlier, when I had followed up with the HR, I was told that they were going ahead with my profile but were waiting for a grant to come in. I was told that on-boarding can't begin before the grant was disbursed. But, a few weeks after the 4th interview, I got a rejection email. I'm unsure what changed but the company's processes seem to be all over the place.