scom group issue

Hi

I have added multiple objects to an existing SCOM group, but when I go to “view Group Members” its not showing those newly added objects on that group. Last time when I added some objects to the same group it took almost a day and then those members were appeared on that group. But this time its more than a day still member objects are not appearing in that group. Any idea what could be the issue. I am using scom 2019.