Hi @Anonymous,
Could you please share a bit more about your scenario?
Do you custom a form for your SP list using PowerApps?
Could you please share more details about the ID_DataCard1 that you mentioned?
I have made a test on my side, and don't have the issue that you mentioned.
Based on the formula that you provided, I think there is something issue with it. I have made a test on my side, please take a try with the following workaround:
Set the Item property of the Edit form (SharePointForm1) to following:
If(IsBlank(SharePointIntegration.Selected) || IsEmpty(SharePointIntegration.Selected),First('20190126_case3'),SharePointIntegration.Selected)
Set the OnEdit property of SharePointIntegration control to following:
Refresh('YourSPList');
EditForm(SharePointForm1)
Set the OnNew property of SharePointIntegration control to following:
Refresh('YourSPList');
NewForm(SharePointForm1)
Set the OnView property of SharePointIntegration control to following:
Refresh('YourSPList');
ViewForm(SharePointForm1)
In addition, please check and see if the following blog would help in your scenario:
https://powerapps.microsoft.com/es-es/blog/separate-custom-forms/
Best regards,