Forms and views displaying the configuration item reference field (CI) do not load or give timeout errors. Also, when trying to find these records in the Global Search, timeout errors occur. The issue happens using any Browser. If the specific field is removed from the form or view, the records are loaded faster with no issues.
The formatter associated to the form is retrieving a huge data to populate the configuration item reference field. This is causing the performance issue.
Edit the form view and get the name of the formatter, notice a macro is associated to the formatter. If this is a custom formatter and macro, review the code is not doing any loop or causing the performance issue.
Ensure the formatter is following the best practices per the formal documentation below and the system properties related to performance are in-place: