Hi Michael,
Thanks for using Syncfusion products.
We have prepared simple sample with DateTimeTextBox in FormView. And we have checked the reported issue and the issue didn’t get reproduced in our end.
Please find the sample in the below link.
Kindly refer the below sample and if you feel that issue still exists, could you please try modifying the above sample with issue and share the same with us, so that we can analyze the problem and provide you a better solution.
Regards,
Rajaveni.
Attachment:
WebApplication1_641eb663.zip