A cursor moves to the end of the string unexpectedly

Scenario:

1. Open the "Configure Element with External Tool" wizard.
2. Go to "Input data" page.
3. Click "Add input".
4. In the "Display name" field of the table row input some value, e.g. "aabb".
5. Click in the middle of this text string, e.g. put the cursor between "aa" and "bb".
6. Input a character, e.g. "c".
   Expected result: the current string is "aacbb", the cursor is located after "c".
   Current result: the string is modified, but the cursor is moved to the end of the string. This is very confusing in case several characters are input consequently, e.g. if "cc" is input to the original string, there will be "aacbbc".

The scenario is also reproduced in the tables on pages "Parameters" and "Output data".