Hello @TheKribus Thanks for reaching out. I have had this issue in the past. Can I check the Dependacy mode you have selected?
Flexible: Ensures no overlap between the dates of items that are dependent on another
Strict: Adjusts an item’s dates to reflect the exact time changes made based on the item that it is dependent on
No action: Items will not shift automatically; they will solely display dependency relationships without making any changes, even if there is a dependency clash
In Monday.com, sub-items do not automatically inherit or adjust their timeline based on their parent item by default. However, you can achieve this functionality using automation.