As per title and I also find out it able to reproduce in the demo site: https://demos.telerik.com/aspnet-ajax/editor/examples/overview/defaultcs.aspx
1. Change to 'HTML' mode.
2. Open 'Find And Replace' dialog.
3. Enter a word to find and hit the 'Find' button.
Notice that the word does not get highlighted. It only happens in 'HTML' mode, 'Design' mode working fine.
Please help as this feature is very useful in my project.