Hello @mvelicheti
We should probably check following settings:
1. The layout of the parent containers should be set to "Responsive Grid" . its available in Dialog of Container component

2. cq:responsive and breakpoints should be set, as suggested by @Rohit_Utreja
3. Verify that you have not modified anything in grid.less. If yes, try replacing it back with original or validate against sample WKND site.
https://experienceleague.adobe.com/docs/experience-manager-64/administering/operations/configuring-r...
Aanchal Sikka