Mouse double-click text selection selects the first word of the next line when dragged past end of first line

def determine_meaning_of_life_on_mac():
    # keyboard shift+select from this point >< and passing the end of line by one click:
    print("nothing on this line is selected - correct")

    # keyboard option+shift+select from this point >< and passing the end of line by one click:
    print("also just reaches the start of this line - correct")

    # keyboard cmd+shift+select this point >< and passing the end of line by one click:
    print("never reaches this line (end-of-line) - correct")

    # single-click mouse select from this point >< and dragging past the end of line:
    print("also never reaches this line - correct")

    # but double-click mouse select from this point > x < and drag past the end of line by one character space:
    print("randomly selects the tab indent and first word on this line below - bonkers!")

    # I had to add the 'x' above, as double click selecting this >< weirdly selects the whole comment line!:
    print("what is wrong with double-click mouse select in PyCharm on Mac?")
    return(6 * 7)

Do you find any solution?

Hi Nick Bailey1 , Mahmoud Hamdy may I ask you to share a screen-cast representing this behavior?

Sure: https://www.veed.io/view/dc063c20-0234-41dd-b510-3798afc8a9a5

The first time I double click select, then I single click and select and then I repeat the double click select.
 

Hi, Dr Nick Bailey this issue requires thorough investigation, please create an issue on YouTrack, attach all relevant information for quicker resolution