Maitai process authoring freezes when returning to previously opened process diagram

Description of problem:
As summary

Version-Release number of selected component (if applicable):
6.0.1

How reproducible:
100%

Steps to Reproduce:

I have been playing with maitai trying mainly the process designer since I believe it could be nice for sharing process work between different teams. However when returning to previously opened maitai process, the UI stays at "loading" part and never finishes (I've waited for several minutes at least).

To make sure this is understandable I did a screen recording (also attached for posterity)
http://download.eng.brq.redhat.com/scratch/sochotni/maitai-freeze.ogv

This repeats each time after returning to maitai authoring part even after cleanup of cookies or starting with fresh profile. Would appreciate a workaround at least for now since the authoring part is currently not accessible at all.

Note:
There is workaround from internal user:

I can reproduce it every time when I open your project, switch to Repository View, and click project.imports. This is really a blocker because the subsequent operations are all blocked - the workbench try to load this file when you open the Authoring window late on. Fortunately I have a workaround for it by appending another anchor at the end of the url, such as #dataModelerScreen to make the loading... gone. You can use your project as usually now. This problem is caused by opening a problematic file in Repository View - the project.imports at this time. So, please always use Project View to avoid opening unwanted files.

I created a test process in the project to verify the workbench works well.