Hi @Anonymous ,
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:
Please make sure that you Edit your Ticket record from the Ticket Screen Gallery as below:
Please also check if the OnSelect property of the MyTicketsScreenGallery to following formula:
Set(SelectedTicket, ThisItem)
then check if the SelectedTicket variable is populated with proper record value.
Then go to your "Edit Ticket" screen, please make sure the Default value of the controls (e.g. Dropdown box, Text Input, Slider, ...) has been bind to the SelectedTicket variable:
Best regards,