Hi, @ilovetvm Thanks for pointing this out, I can reproduce this issue in the upstream. After investigating, I found that it stuck in the method LegalizeInvalidAttach of normalizing step. It is an invalid schedule and should be failed. 
Hi, @ilovetvm Thanks for pointing this out, I can reproduce this issue in the upstream. After investigating, I found that it stuck in the method LegalizeInvalidAttach of normalizing step. It is an invalid schedule and should be failed.