The only way this can happen is if you have corrupted Lua files related to editor or modified key bindings. Once you delete the cache, and if the game files are intact, you should not get this behavior. Several screenshots or ideally a clip would help us more investigate the issue. If this happens with a clean install and a cleared cache, then we have a problem on our side, otherwise it might be related to you specific install or mods. Please reply with any results after the cleared cached and/or clean install.