As you may known, the mentioned journal recently listed as one of invalid journals according to the Iran ministry of health.In my opinion the decision might be due to the cooperative activities between some Iranian publishing companies and the journal.
The mentioned journal is not valid any more in Iran and I also think its because of many papers which have sent by companies to the journal.
Although the editor of the journal have changed and the former chief editor has signed the acceptation letters but the new editor has rejected all of the papers.