Show curson when CTRL clicked causes FOCUSOUT event to run

Distribution

Mint 22.1

Package version

6.4.8

Graphics hardware in use

Intel Corporation Iris Plus Graphics G7

Frequency

Always

Bug description

When I pressed Copy or Paste, the window was often losing focus - eg a browser extension open would close as the focus was lost.

On some testing, I found, through XEV that pressing CTRL was causing the FOCUSOUT event to run.
Turning the Mouse> Show position of pointer when the Control key is pressed setting off stopped this behaviour.

Result from XEV:
With Setting on

FocusOut event, serial 38, synthetic NO, window 0x6000001,
    mode NotifyNormal, detail NotifyNonlinear

PropertyNotify event, serial 38, synthetic NO, window 0x6000001,
    atom 0x18f (_NET_WM_STATE), time 4789584, state PropertyNewValue

PropertyNotify event, serial 38, synthetic NO, window 0x6000001,
    atom 0x1bc (_GTK_EDGE_CONSTRAINTS), time 4789584, state PropertyNewValue

With setting off

MotionNotify event, serial 38, synthetic NO, window 0x6000001,
    root 0x4ca, subw 0x6000002, time 4983370, (26,41), root:(1090,380),
    state 0x14, is_hint 0, same_screen YES

MotionNotify event, serial 38, synthetic NO, window 0x6000001,
    root 0x4ca, subw 0x6000002, time 4983379, (27,41), root:(1091,380),
    state 0x14, is_hint 0, same_screen YES

KeyPress event, serial 38, synthetic NO, window 0x6000001,
    root 0x4ca, subw 0x6000002, time 4983946, (27,41), root:(1091,380),
    state 0x14, keycode 55 (keysym 0x76, v), same_screen YES,
    XLookupString gives 1 bytes: (16) ""
    XmbLookupString gives 1 bytes: (16) ""
    XFilterEvent returns: False

Steps to reproduce

System Settings > Mouse > Show position of pointer when the Control key is pressed to on

to

Open a browser extension window
Press CTRL-C or CTRL-V

The window will disappear as the focus is lost, and you cannot copy or paste to it easily...
Sometimes it works on 2nd or 3rd try

Expected behavior

Should just copy/ paste / other uses of CTRL in the window, no change to focus.

Additional information

No response

Reproduce the focus loss with the Mouse setting enabled, using the browser extension window and XEV output described in the report. Trace the FocusOut event alongside the pointer-position display behavior; done means CTRL-C, CTRL-V, and other CTRL uses no longer change focus or close the window.