Cannot create a new subwiki from a template

STEPS TO REPRODUCE

Preconditions: a fresh XWiki 10.5RC1 instance is available.

1. Login as Admin
2. Go to Wiki Index
3. Create a new subwiki (Standard Flavor) by marking it as template (On Template tab, tick 'This wiki will be a template')
4. Go to Wiki Index
5. Create another subwiki by selecting the previous one as template

EXPECTED RESULTS

The new subwiki is created successfully based on the selected template.

ACTUAL RESULTS

The creation process is not finished, some errors are encountered in the browser (screenshot attached) and the following stacktrace is displayed in console:

2018-06-14 10:45:14,468 [pool-2-thread-3] ERROR o.i.ObservationContextListener - Can't find any begin event corresponding to [org.xwiki.job.event.JobFinishedEvent@4f844d8f]

I've tested also on XWiki 10.4 and the issue cannot be reproduced.

The workaround is to ignore the report and go directly to the (properly created) wiki.