Acrylic in Tab Row has a weird blur on the bottom

[zamadatix]

Windows Terminal version

1.13.10336.0

Windows build number

21H2 22000.469

Other Software

With "Show acrylic in tab row" set:

The blur isn't rendered consistently when part of the window is not on a monitor:

In this example the window is dragged to the right so half of it is not on any monitor. The top part of the title bar blurs the non-existent space as black but the bottom part of the title bar ignores the non-existent space and only blurs the background of the portion of the bar actually on a display(s). Note particularly on the far right of the title bar.

Steps to reproduce

Enable acrylic in tab row -> restart -> drag part of the title bar off the screen. Easiest to see if you have something bright in the background of the window.

Expected Behavior

The top and bottom part of the title bar use the same blurring method.

Actual Behavior

The top and bottom parts of the title bar use different blurring methods.

[zadjii-msft]

Hmm. This vaguely reminds me of microsoft/microsoft-ui-xaml#6684.

@zamadatix what display scaling is your monitor set to?

[zamadatix]

Standard 100% scaling. It is HDR if that is relevant.