In Chrome, when in a process model and on a sub-process Task, clicking the plus button in the box generally brings up a small display of the attached sub-process, which a user can open, unlink, etc. The options still work, but the preview image does not display. A moving circle just keeps going round and round. It should show the preview.
In addition, with the same shape, if a user wants to attach a current process using the +, when the process is selected, the same thing, spinning circle with no preview. Please advise.
This issue is solved under the new Editor, you can switch to it using the icon at the top right corner in Editor.
If you are still affected by this issue under the new Editor, you can open a support request mentioning this article.
KBA , BPI-SIG-PM-MOD-EDT , Graphical Editor for SAP Signavio Process Manager , How To