Hi @zarski ,
Could you please share a bit more about your issue?
Could you please share a screenshot about your issue you faced in your app? Does this issue occur within the Person ComboBox box in your Edit form?
Further, could you please show more details about the Person fields that you mentioned? Do you enable "Allow multiple selections" option for the Person field in your SP list?
Based on the issue that you mentioned, I have made a test on my side, and don't have the issue that you mentioned. The screenshot as below:
According to the issue that you mentioned, I think this issue is related to the region setting in your PC. Please check if you have set the Region setting in your PC to your local region as below:
Note: Most browser default to the host operating system's setting with some also providing a way to set the language manually.
Please check the following article for more details:
https://docs.microsoft.com/en-us/powerapps/maker/canvas-apps/global-apps#language-settings
Also please consider re-start your PC, then re-create a new PowerApps app based on your SP List data source, check if the issue is fixed.
Best regards,