When I type a user's name into a dropdown control for a Sharepoint person/group column, their email and displayname are showing up but their image all of the sudden stopped showing. I'm using this image as an OnSelect property so I need it to populate.
Could you please share a bit more about your issue?
Do you mean that the Image Preview could not be displayed well within the Person Picker Combo Box within your Edit form?
I have made a test on my side, and don't have the issue that you mentioned. Please check the following GIF screenshot for more details:
Please check if you have bind the Image property of the Person Picker Combo Box to the Picture property of the Person type column in your SP list as below:
Please also consider take a try to remove the Person column from your SP list, and then re-add a new Person column in your SP list, generate a new app based on your SP list, check if the Image Preview displayed well in your Person picker Combo Box.
If the issue still exists, please consider take a try to enable the "People or Groups" option for your Person column in your SP List settings rather than "People only" option, then check re-generate a new app based on your SP list, 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.