1.
crossing paths, passing each other, missing each other
The physical act of passing by someone going in the opposite direction or failing to meet due to different timing.
2.
misunderstanding, miscommunication
A failure to understand each other correctly, often due to different expectations or assumptions.
Related Words
Related:
食い違い (discrepancy, disagreement)
Related:
すれ違い (passing by)
Compare:
手違い (mistake)