While using FBDI, the import batch is going into progress state and getting stuck.

While using FBDI, the import batch is going into progress state even the import schedule is set to ON DATA LOAD since days and hasnt moved at all, tried moving it to manual as well but nothing works.

and the batch size is not huge, 10-12 SKUs and if I try them individually it works. If it would have been a SKU lock situation it should have caused issues in individual edits too but that's not happening.