We have an older application that was using the 2015 version of Telerik.Web.UI control. We use a RadGrid that employs a web user control for adding and editing rows.
Before the upgrade, working with any of the dropdowns, radio buttons, and calendar controls on the ascx web edit control worked smoothly. However, after upgrading to 2021.1.224.45, the entire edit webform blinks out and back in, which is very jarring to the end user.
Here is the code for the edit form:
The majority of the control data on this edit form is loaded when the form loads, so there are no real performance bottlenecks on each individual control.
I'm not sure why postbacks with the newest version appear to be slower. Before the upgrade, only one of the text fields (which has a name lookup function) would very slightly flicker. The entire form never flickered or blinked.
Is there anything I can do on the grid via settings that would remedy this issue? I'm working under a time constraint to get Telerik upgraded on this application to ensure the application no longer has the AsyncUpload vulnerability of version older than the 2020 version, so I'm trying to not delay the upgrade process by reworking the entire edit form.