MBB No Case during 1st round Interview

I recently had a first round interview with a MBB firm for an European office. It was via their MBA recruiting process. My first interview was all conversational and no case. My second was a case. Wondering what this means? Others who interviewed for the same office had two cases.

As they are going to other cities for MBA recruiting, was told we'd find out by the end of week of status for 2nd round. I haven't heard yet which can't be a good sign.