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Known Issues & Conflicts

Randomized Questions on WPEngine Hosting #

You can find the Randomize Order feature under Display and Content Options > Custom Question Ordering (or display subset of questions). This feature does not work properly with the default WP Engine settings. The following is needed for it to work properly:

  • Navigate to WP ENGINE > GENERAL SETTINGS
  • Look for ORDER_BY_RAND (which is set to disabled by default)
  • Change the setting to enabled

Once this is enabled, the Custom Question Ordering feature should work as expected.

Timing of Emails Sent by Notifications Add-On #

To ensure the notifications function properly and emails are delivered on schedule, youll need to implement a custom cron job on your server. For the notifications to send properly and on time, you will need to add a custom cron job to your server. This is due to the limitations of WordPress mail system. See this article for instructions on how to set up a server cron job to help your notifications send on time.

Export Quiz To Excel Plugin by WP Plugins For You #

Several reports have been raised about this 3rd party plugin causing quiz questions to be removed. If this has occurred on your site, please contact the plugin vendor for assistance in rectifying the issue.

SG Optimizer by SiteGround Hosting #

The SG Optimizer (and other image optimizing plugins) can cause certificate images to be distorted, or contain solid black areas within the image. To mitigate this issue, it is recommended that image optimization be selectively disabled on images used in certificates.

Blank Settings Pages #

This is the result of using LearnDash v3.x.x on any WordPress version prior to 5.0. To address this, upgrading to the latest version of WordPress is recommended. For users who dont want to use the Gutenberg editor, you can still use the Classic Editor.

WPML and Quiz Question Answer Options #

WPML translation capabilities cannot be applied to the available answers in a quiz question. This is being investigated further by development. There is no known workaround at this time.

Duplicate Page or Cloning Plugins and Quizzes #

Quizzes and Questions should not be cloned with third-party plugins. Doing so will result in irreversible issues. The cloned quizzes and questions cannot be used and should be deleted.

If you need to clone your quizzes, use the built-in quiz import/export feature found under LEARNDASH LMS > QUIZZES > ACTIONS > IMPORT/EXPORT.

Sorting or Matrix Sorting Questions Won’t Auto-scroll While Dragging the Answer to the Bottom of the Page #

If you selected the Sorting or Matrix Sorting type of questions with items that are displayed outside of the screen area on the front-end, dragging the items down to the correct option will not move or auto-scroll the screen. You may have to instruct your students or users to scroll using the mouse wheel or zoom the screen view out so that they can drag the items to the correct answers. They can also press the arrow buttons or spacebar on the keyboard while dragging the answer to scroll the screen up or down.

If you are affected by this issue, you can try adding the following CSS to your site (Appearance > Customizer > Additional CSS) as we have found that it works for those having this issue.

.wpProQuiz_content .wpProQuiz_questionList,
.wpProQuiz_content .wpProQuiz_matrixSortString,
.wpProQuiz_content ul.wpProQuiz_maxtrixSortCriterion {
  overflow: hidden;
}

Concatenate JS by JetPack Boost and Quizzes #

The Start Quiz button and Autostart feature may not work when the Concatenate JS option is enabled in the Jetpack Boost plugin. To avoid this conflict, keep the Concatenate JS feature disabled while using LearnDash quizzes.

Concatenate JS by JetPack Boost

Invisible Quiz Answer Text After Astra Theme Update to 4.9.0 #

A recent update to the Astra theme (v4.9.0) has caused quiz answer text to become invisible in LearnDash quizzes. It altered the default color settings for quiz answer text, resulting in a color that blends with the background. This issue affects users relying on the Astra theme for their LearnDash courses.

Solution: There are two methods to resolve this issue: adjusting the Astra theme’s color settings or using custom CSS.

Method 1: Adjusting Astra Theme Color Settings

  1. In your WordPress dashboard, navigate to “Astra” and click “Dashboard.”
  2. Click the “Color (Customize)” block or button within the “Quick Settings” section.
  3. Find the “Global Palette” within the color customization options.
  4. Below the “styles” section, you’ll see nine colored circles. Click on the sixth circle (Color 6). This color controls the quiz answer text.
  5. Select a color that provides sufficient contrast against the background, such as black or dark blue.
  6. Click the “Publish” button at the top of the customization panel to save your changes.

Note: Always create a full site backup before making any changes or updates to your website.

Method 2: Using Custom CSS

If adjusting the Astra color settings does not resolve the issue, you can use custom CSS to override the theme’s default color settings.

  1. From your wp-admin dashboard, navigate to “Appearance” > “Customize” > “Additional CSS.”
  2. Paste the following CSS code into the text area:
.learndash-wrapper .wpProQuiz_content .wpProQuiz_questionListItem label {

color: black !important;
}

*or choose any color that would make the text visible against the background

  1. Click the “Publish” button to save your changes.

Issue with LearnDash “Quiz Saving” and “Check Answer” functionality #

There is currently an issue affecting some users’ ability to interact with LearnDash quizzes, particularly around the “Check Answer” and “Quiz Saving” functionality. The most common cause is the “Save quiz progress” setting having an autosave interval that is too short (e.g., 5 seconds), which can cause incomplete data writes, especially under heavy website traffic.

What you can expect to see with this issue:

  1. The “Check Answer” button not responding
  2. Quiz attempts appear locked or unclickable
  3. The appearance that quiz answers are saved when they are not

What can you do to prevent this issue from occurring?
Set your autosave interval to a higher value, between 30 and 60 seconds, to reduce risk on higher-traffic websites.

Solution: LearnDash Support can provide a plugin that identifies and removes old metadata, helping to resolve this issue. Please reach out to our support team if you experience this, and we will gladly provide the plugin download and instructions for using it.

Updated on January 6, 2026