Mint-Y: Thick border on windows with titlebar when switching light/dark theme

Distribution

Mint 22.2

Package version

Mint-themes 2.3.2

Graphics hardware in use

Intel Raptor Lake-P [Iris Xe Graphics], NVIDIA GA107M [GeForce RTX 3050 4GB Laptop GPU]

Frequency

Always

Bug description

as you can see this is happening when opening a window (with titlebar) when using dark them, then switch to light theme

this border disappear if I maximize the window and de-maximize it back (of if I also put it in a fullscreen, or if I minimize it and restore it back)

Steps to reproduce

1- switch to dark theme from settings
2- open any application with titlebar
3- switch back to light mode

Expected behavior

There should be this black border after switching theme from dark to light

Additional information

Note: I'm talking about Mint-Y theme, as this bug is not happening for other themes
This also happened for Mint 22.1

No file or test is named in the issue. First reproduce the Mint-Y theme switch sequence on Mint 22.2: open a titled window in dark mode, switch to light mode, and inspect the Mint-Y theme styles for the border state. Done means the unwanted black border does not remain after switching themes and normal window state changes are no longer needed to clear it.