Thank you for your reply I am using lastest Geany 2.0 with GTK+ v3.24.39 and GLib v2.78.0 runtime libraries on Windows 11 platform. It's hard to explain 'jump' with words, please refer to the attached two snapshots: 1.png shows characters in normal position, 2. png show characters move down little bit after click at the end of line. and you can see the vertical position of characters within the parenthesis 'jumps' every time you click at the end of line.
 