I tried to reproduce the described behavior, but to no avail.
Could you please try recreating the same issue with this online demo
, and get back to me with the image used and the exact steps that lead to the issue. Thi sway I will be sure that I am following the same scenario.
If you are unable to reproduce it with the demo, then this could be a side effect of a specific configuration. If this is the case, I will need more details about the specific configuration of the RadEditor control and any vital application configuration matter that could be related. It would be event better, if you could provide a simple project that isolates the issue, so that I could directly investigate the source of this unexpected behavior.
Check out the Telerik Platform - the only platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native mobile apps.