Activity Chaining Not Working the second time of upload a file (File Upload in a GridLayout)

Hi,

I'd like to ask what are the possible reasons why chaining won't work? and what could fix this issue.

I have this process which has subprocesses that parses contents of excel file.
I uploaded first the excel file (using fileupload in a gridlayout) then click "Import Excel File" button.
This button skips validation and in submits the form then the process will get the file uploaded and parsed.
Once it is parsed it goes back automatically(activity chained) to the form where it initially came from.
The problem is the second time of uploading (removed the previously uploaded file and uploading new file) it won't automatically go back to the form.
The activity chaining won't work. I tried other scenario, wherein the previous file is retained then clicked "Import Excel File" button but still won't return to the form.
There are no asynchronous proces...

OriginalPostID-258232