Reflection time of SSL inspection exclusion settings

I have set SSL exclusion in the SSL inspection policy, but it does not exclude inspection for the URL set in the URL category.
Will it take time for the settings to take effect?

We are “activating” ZIA.

Any change to the Zscaler ZIA policies should take effect as soon as you save the policy and activate the changes. It can be that you browser is still caching the old connection and certificates. This means you probably have to fully exit / close the browser and access the site again from the start. If the exceptions are correct you should now be bypassed from SSL inspection and see the original Certificates.