Time will be disabled for the map when you are editing.
Solution: After you stop editing, you can enable time again.
More information: When time is enabled, you may only see a subset of features in a layer. However, when editing, all features will be shown on the map since time is disabled. You need to be aware of the temporal context of your edits to avoid introducing inaccuracies and inadvertently editing features that exist in different time periods.
You can update the time properties for a layer while time is disabled on the map, but the changes will not take effect until you stop editing and enable time on the map.