Scripting additions make macos 15.3.2 crash when connected to a sidecar display

Hi,

I use my iPad Pro 13 as an external monitor form my MBP. I am using yabai for years and this setup as a daily basis for months now without any issue.

Last night, my mac book pro upgraded to Sequoia 15.3.2.

This morning I experienced weird behaviour **as soon as I connect my iPad as external display with sidecar** (yabai is working fine without ipad used as external display):
- wallpaper removal on all / some displays / blank screen (only menu bar working)
- no more Dock
- yabai not functional
- crash of WindowServer after some time and go to login screen

I did the following:

- upgade / reinstall yabai from yabai-v7.1.10 to yabai-v7.1.11 > crash
- upgrade the iPad to latest iPad OS (18.3.2) > crash
- try external connection through Wifi or USB-C cable > crash
- **uninstall yabai, reboot, connect iPad as external monitor > working**
- **disable scripting addition load in yabai setup, reboot, connect iPad > working**
- **uninstall yabai, connect ipad, install yabai, enable scripting additions > seems working but didn't try long**
- **reboot with scripting additions disabled, connect ipad, enable scripting additions, restart yabai > seems working but didn't try long**
- **disconnect ipad,reconnect ipad with yabai fully working > continue to work**
- reboot computer, retry iPad connection > crash

So basically, with my setup I need to:
- uninstall yabai / scripting additions the first time I open my session after a reboot
- connect iPad
- install yabai / scripting additions

To have my computer working with scripting additions.

Any idea of what can cause the trouble ?

Are there any quick way to unload scripting additions ? kill Dock ?

My setup is the following:
- MBP M2 Max
- Macos Sequoia 15.3.2
- iPad Pro M4
- iPad OS 18.3.2
- yabai 7.1.11 with SIP disabled and scripting additions

The lines of my yabairc file related to scripting additions are located at the beginning and are:

```
yabai -m signal --add event=dock_did_restart action="sudo yabai --load-sa"
sudo yabai --load-sa
```

Start with the scripting-addition commands in the reported yabairc snippet, especially the dock_did_restart signal and sudo yabai --load-sa, and reproduce the crash with Sidecar connected after reboot. Compare behavior with scripting additions disabled and inspect the resulting WindowServer crash information. Done means identifying the triggering interaction or documenting a confirmed workaround.

Written by the indexing model from the issue text.