@kedar_sirshikar 

Few things to check:

1. Confirm the execution order of your client scripts. In some cases, the order in which client scripts are executed might impact their behavior. Ensure that the desired script is not being overridden or skipped due to the execution order.

2. Review the logic in the client script that is not consistently executing. Ensure there are no conditions or errors that might cause it to skip execution.

3. Clear the browser cache and try again. Cached scripts might not be updated, leading to inconsistent behavior.

4. If your client script relies on script includes, ensure that the script includes are being loaded correctly and are available at the time of execution.

5. Review the ServiceNow instance logs for any errors or warnings related to client script execution. This can be found in the "System Logs" module.

Kindly mark helpful/accepted if it helps you.