According to my understanding of your problem,when you run a Microsoft SharePoint 2013 workflow in SharePoint Online, you experience the following behavior:
The status of the workflow returns an internal status of Suspended.
Please follow these steps:
Open the affected workflow in Microsoft SharePoint Designer 2013.
On the Workflow Settings page for the workflow, clear the Automatically update the workflow status to the current stage name check box.
Save the workflow, and then and publish it to the SharePoint website.
Run the workflow again.