Gl interface stuck transactions

Summary:

When the Integration run happened, if we check for any transactions stuck at interface.
1. There are 2 error lines from the same Batch id and different journals.
2. There are few lines in Pending status which doesn't have any error but those are from the journals which has errors.
3. There are few lines in Pending status which has errors but those are from same Batch id but different journals.
Our question here is, why are those (3rd point) lines are giving error but the status as P not any error codes. But giving the same error as those error lines.

Please help to know this.