However, now when my colleagues enter data into the Person or Group Type field via a custom PowerApps form, the data is not being saved in the SharePoint list. As the field is a required field, it is only showing required info.
On the other hand, I being the creator of the custom PowerApp form, don't have this issue.
For your information, I have even tried to use MS Flow to manually update the sharepoint list, but it still didn't work. In addition, I have tried to create a new Person field in PowerApps form, which also had the same issue. I have also provided the full control SharePoint premission to my colleague, and it still didn't fix the problem.
Hence, please help me to fix this problem, this system was supposed to launch tomorrow.
Do you mean that the custom form app work well few days before without any issue?
Based on the issue that you mentioned, I have made a test on my side, and don't have the issue that you mentioned. Please consider take a try to re-store your custom form app to previous version, then check if the issue is solved.
More details about re-store your app to previous version, please check the following article:
You could also consider remove the custom form in your SP list, then re-create a new one for it, check if the issue still exists. Please also take a try to enable the "Allow selection of Groups" option for your Person type column in your SP list, then try your custom form app again, check if the issue is fixed.
If the issue still exists, please consider re-create a new SP List, then re-create a custom form app for the new created SP list using PowerApps, check if the issue is solved.
Community Support Team _ Kris Dai If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
I don't have time to create a new SP list with custom form again, as I have already done a lot of customization on the PowerApps form. However, I have tried your other solutions, but it still didn't work.
By the way, I did solve this problem by an alternative way, by adding a Text fields in to the PowerApps form which will get the value from the Person Type fields. This solution was a temporary workaround and it was working fine.
However, now also this solution is not working, when my manager opens the link he can only see the field "Applicant" as blank, without the Applicant name.
Please advice if there is any other solution, which can help me to fix this issue, thanks.