I knew about this bug for quite long time, but didn’t report it as I didn’t know how to reproduce it. Well, now I know.
When you renaming object (scene, actual object, external event - doesn’t really matter) and you move mouse cursor outside tree list area to scene or event editor area, renaming will be ended, like you would press enter. I think it may be bug in OnMouseOver/OnMouseMove event of controls for editing level/events (bug’s only there, start page is OK - dunno how events work in wxWidgets - as I said in other thread I’m using QT for my programs so I entered both names of suspected event) which leads too deactivating any previously activated control when mouse enter the area of scene/event editor.