Hi Daniel,
I just did some tests on my system.
The initial Save was also failing with the provided string containing *.
When I removed the * I was able to save the policy.
Following that, I went back to edit it, added the correct string again (with *) and the update works (I also checked in the DB that the update is reflected).
I was able to reproduce this several times.
So only the initial Save seems to have a problem with the special character.
MichaelBoehm