I first tried to find the issue with "lookup issue" 
and then in the creation of the task use the {{lookupIssues}} but it didn't worked and as the function gives a restricted list of values, I decided to have a try with

rather than

Still I have the same results.

The logs are correct. The rule does create the issue in the other project. It is just the link that does not work when I try to do it like that.
Any idea ?
Any ways to achieve what I want to do with the additional fields ?