DS 2015 x64 SP1

When editing the text in a block w/ attributes, the editing window will be available. Why does the cursor always jump to the end of a text string? Say I had an entry of "Electrical Layout" and I wanted to edit to show "Electrical Design Layout". I would click in between Electrical and Layout, to add text. As soon as I hit the space bar, the cursor will jump to then of Layout. Once I return it and start typing, it will continue to jump to the end of Layout, after each keystroke.