edit submission reload triggers user logout

[bilias]

There seems to be a bug with this plugin.
I can reproduce it in 2 sites with the following scenario:

1. User is editing submissions
   /mod/assign/view.php?id=61&action=editsubmission

2. clicks on a collection from mahara
   /auth/mnet/jump.php?hostid=3&wantsurl=view%2Fview.php%3Fid%3D62

3. reload the edit submission page on moodle <<<--- this is what triggers the error

4. click again on an collection from mahara

user is logged out. I cannot trace where the logout comes from.
Other jumps from moodle<->mahara work ok.
only edit submissions triggers the logout.

[skarga]

I have just reproduced this problem for mahoodle = mahara 18.10 + moodle 3.5

[sandeepgill]

I have the exact same issue with mahara 18.04 and Moodle 3.5