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Turnitin add-on known issues

This page outlines current known issues that may impact your experience of any Turnitin add-on products, along with any available workarounds or updates on resolution status. 

If you are experiencing issues with any of our general Turnitin features or with your LMS, visit their integration pages. 

Found something new? Get in touch with our support team at the Turnitin help center.

OriginalityDraft CoachClarityResolved

All Originality add-on issues as of: 26 November 2025

Minor discrepancies may appear between AI writing detection scores

Turnitin license(s): Any license with AI writing detection enabled

We’re aware of an issue where users may notice a small discrepancy between the AI writing detection score shown in the assignment inbox and the score displayed within the full report. This difference is caused by the way scores are rounded at different stages of the calculation and display process.

Although the discrepancy is minor, it may cause confusion when comparing scores across the interface.

We are working to implement a resolution as soon as possible.


AI writing detection shows incorrect message during processing

Turnitin license(s): Any license with the Originality add-on

We’re aware of an issue where, during the AI writing detection processing period, users may briefly see an error message stating that “AI writing detection is unavailable for this submission.” This message includes reasons such as “excluded by instructor,” “unsupported file type,” or “resubmission excluded,” even though these do not apply to the submission in question.

This occurs while the system is still generating the AI writing detection results. Once processing is complete, the expected AI score and report are displayed as normal.


Reports under Critical in dashboard failing to load (Authorship)

Turnitin license(s): Any license with the Originality add-on

Sometimes users are unable to access reports that have a large number of papers attached, and the following message displays instead: “Hmm...we couldn't find that. Please check to make sure you've entered the correct URL.” We are investigating this issue.

Workaround: Please close the tab where the error is displayed and try reopening the report again; this may take several attempts. If the issue persists, it’s recommended to relaunch Authorship.


Browser issue impacting AI detection visibility

Turnitin license(s): Any license with the Originality add-on

There’s a known issue that is causing the AI writing administrator setting and the AI writing indicator to be hidden from users. This is a browser issue primarily impacting users on the Safari browser.

Workaround: To resolve this issue users should clear their cache. We also recommend that users ensure that any pop-up blocking settings allow pop-ups from Turnitin.


Non-US Turnitin Feedback Studio with Originality users unable to access AI writing detection when launching the document viewer from the Authorship Report

Turnitin license(s): Any license with the Originality add-on

There’s a known issue that will prevent non-US Turnitin Feedback Studio with Originality users from being able to access/see the AI Writing indicator score in document viewer launched from Authorship.

Users will still be able to access the AI writing detection indicator and the AI writing report when they open a Similarity Report from their inbox.


Hidden text will flag white text on colored background (Authorship)

Turnitin license(s): Any license with the Originality add-on

The hidden text flag will identify instances where white text has been used

As most essays are written on a white background, this method will usually be able to identify instances where a student has attempted to hide text

This will unfortunately also cause a false flag when white text has been used on a colored background; for example, white text on a black background


The image viewer is unable to display TIFF files (Authorship)

Turnitin license(s): Any license with the Originality add-on

The image viewer is unable to display TIFF files

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