title bar is rendered off to the side of the the app window

[mrsteve0924]

Wayfire version

0.12.0-dea6fabd (Aug 1 2026) branch master wlroots-0.20.2

GPU / Driver

NVIDIA GeForce GTX 1660 Ti/PCIe/SSE2
NVIDIA 610.43.03

Describe the bug

When running VIrtualBox (and this seems to be only happening in VirtualBox), the title bar is rendered off to the side of the the app window. If I move the window the title bar snaps back into place. see video

To Reproduce

run VirtualBox from terminal or desktop file

Screenshots / Videos / Stacktrace

output.mp4

Additional context

I've tried running VirtualBox with different env settings but issue persists.
QT_QPA_PLATFORMTHEME=qt6ct VirtualBox
QT_QPA_PLATFORMTHEME=qt5ct VirtualBox
QT_QPA_PLATFORMTHEME=xcb VirtualBox

I am using pixdecor.
i did a git bisect on my current wayfire and identified edd429e as the first bad commit.
this bug doesn't appear if using the decorate plugin. so not sure if specifically a wayfire bug or pixdecor bug.

[ammen99]

probably pixdecor bug, floating point geometry requires careful alignment, esp if you use fractional scale (but alignment issues exist even on integer scales)