The issue is where is your Collection located?
1. If OnVisible of the screen, ensure you navigte to a different screen and back before it will be refreshed
2. If it located OnStart, you have to restart the App before it will be refreshed
3. If it OnSelect of a Button, then click the button after you submit data
4. If you are you are using a form, you can put the collection OnSuccess of the form
5. Then you can also refresh the Datasource
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