I have a Sharepoint Datasource that will not refresh. I have removed the Datasource, saved App, closed App, opened App, added Datasource and still has old data. I can Edit Data on Data screen and see the proper data. I tried creating a button to refresh datasource, still no luck. Opened PowerApps in Chrome Incognito mode, also no luck.
Which version of PowerApps Studio do you use on your side?
Do you mean that the new data added in your data source could not be refreshed within your app?
I have made a test on my side (my PowerApps Studio version is 3.19034.12), and don't have the issue that you mentioned. Please take a try to clear cache of your browser, then try your app again, refresh you data source, check if the issue is solved.
In addition, also please consider take a try to re-create a new app based on your data source, check if the issue still exists.
If the issue still exists, please consider take a try to submit an assisted support ticket for help through the following link: