Running Moodle 3.3.3+ (Build: 20171123). We use the Turnitin Plagiarism plugin (v. 2017112302) and Turnitin Assignment 2 (v. 2017112301).
I hope this is the appropriate forum for this issue. I also tried searching the Moodle Tracker, but this is a nuanced issue and I was not having luck finding anything similar.
Long story short, we use the Turnitin Plagiarism Plugin (TII PP) to process forum posts and assignment submissions. When you perform a search in the forums, the TII Similarity Score does not appear with the corresponding post. I posted this issue on the TII PP Github page, and Dan Marsden advised that this sounded like a problem with the Moodle Plagiarism API, not something specific to the TII PP.
Below is a screenshot of what I mean. The same forum post is shown in two separate windows. On the left, is the forum post as it appears in search results. On the right, is the same post as it appears in the actual forum. Notice that the post in the search results does not have the TII Similarity Score or Originality Report.
One of the ways that our instructors assess student discussions, is to search for the student's name (Advanced search > Author) with the Forum search function, so obviously missing this piece of information is inconvenient.
I have never posted to the Moodle Tracker before, and I do not want to disrespect the process and workflow. That said, if folks think this is a legitimate issue, I would be happy to create an issue there. Please let me know if I can help describe this in any more detail!