I'm using the WPF Telerik R3 2020 version. When ever the ribbon view is collapsed, it goes off screen and I don't know why. see the screenshot of the UI and code below. Using .NEt 4.8.
This behavior is known and it relates to usage of Popup control for the minimized content of RadRibbonView. You can find a couple of items on the topic in the Telerik UI for WPF feedback portal.
Virtual Classroom, the free self-paced technical training that gets you up to speed with Telerik and Kendo UI products quickly just got a fresh new look + new and improved content including a brand new Blazor course! Check it out at https://learn.telerik.com/.