Red border appears on FAComboBoxItem when selected via Tab key

[Qianyiaz]

Describe the bug
When navigating through FAComboBoxItems using the Tab key, a red border/outline appears around the selected item. This seems to be an unexpected focus visual effect.

Screenshots
Like this,

Desktop/Platform (please complete the following information):

• OS: Windows 11
• FluentAvalonia Version: 2.4.1
• Avalonia Version: 11.3.9

Additional context
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