SUMMARY
If Application Dashboard is used as the app launcher on a panel that is set to auto hide, the panel stays visible if the Application Dashboard is invoked via Meta key (instead of mouse click). 

STEPS TO REPRODUCE
1. In a fresh session, right click on Kicker icon, "Show alternatives", select Application Dashboard.
2. Right click on panel, "Enter edit mode", set visibility to auto hide.
3. Press Meta key to open the Dashboard.
4. Click on an app icon (e.g. Dolphin).

OBSERVED RESULT
Panel stays visible and doesn't auto hide anymore. Hovering over the panel with the cursor doesn't change that.

EXPECTED RESULT
Panel stays hidden until hovered with the cursor.

SOFTWARE/OS VERSIONS
KDE Plasma Version: 6.0.80
KDE Frameworks Version: 6.0.0
Qt Version: 6.6.2

ADDITIONAL INFORMATION
* Reproduced with Neon Unstable installation and with OpenSuse Krypton live image.
* Happens both on Wayland and X11.
* Happens both with floating and non-floating panel.
* Does _not_ happen if Application Dashboard is launches via mouse.
* On Plasma 6.0 stable this happens sometimes too, but I have found no way to reliably reproduce it there.