[BUG] Crashing completely when used with latte dock's "Window Buttons" applet

[jonchun]

Describe the bug
When latte dock's "Window Buttons" applet is using the hello decorations after a plasma restart it completely dies/has trouble recovering.

To Reproduce
2. Set up a latte panel at the top
3. Add "Windows Buttons" applet to top panel
4. In Latte Dock Settings, enable "support borderless maximized windows in different layouts"
5. restart plasma

kwin --replace &
plasmashell --replace &

6. While having a window maximized use either the windows buttons applet OR just clicking/dragging to move the window with empty space feature
7. Get crash.
8. After a few reboots I'm actually no longer able to reproduce this, but I will report it anyways because there was clearly a problem at some point.
   Expected behavior
   A clear and concise description of what you expected to happen.

Bug inheritance
This bug does not occur on Breeze/other decorations.

Additional context
kcrash logs/additional info here: https://bugs.kde.org/show_bug.cgi?id=419812

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