Prerequisites

• Write a descriptive title.
• Make sure you are able to repro it on the latest released version
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Exception report

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Screenshot

Long-time Vi mode user. For a couple of years, I've been dealing w/ an obscure behavior and finally taking time to report it.

Issue: In Vi insert mode with PredictionViewStyle set to ListView, the first DownArrow press after reusing the list selects a history item internally but fails to render its highlight until another navigation key is pressed.

More Detail:

When using these PSReadLine options:

Set-PSReadLineOption -PredictionViewStyle ListView
Set-PSReadLineOption -EditMode Vi

the first DownArrow press in the prediction selects a history entry internally without visually rendering the selection highlight.

Pressing Enter at that point executes/accepts the first history item, which indicates that the item was selected despite no visible highlight. Pressing DownArrow a second time causes the selection highlight to appear. After that, UpArrow and DownArrow behave and render normally.

Note: The issue does not occur the first time ListView is used in a new PowerShell session; it only begins after ListView has already been used once.

Entering Vi normal mode and then returning to insert mode resets the behavior, e.g. Esc + i. After that, the first DownArrow press renders correctly again, until the issue recurs.

Environment data

PS Version: 7.6.3
PS HostName: ConsoleHost
PSReadLine Version: 2.4.5
PSReadLine EditMode: Vi
OS: 10.0.26100.1 (WinBuild.160101.0800)
BufferWidth: 180
BufferHeight: 50

Steps to reproduce

1. Run pwsh -noprofile
2. Run Set-PSReadLineOption -EditMode Vi
3. Run Set-PSReadlineOption -PredictionViewStyle ListView
4. In Vi insert mode, type text that produces history predictions
5. Use the ListView and navigate it with DownArrow (on the first use in a new session, the highlight appears as expected)
6. Complete or dismiss the ListView (e.g. ESC to dismiss and cc to clear the line/command)
7. Trigger ListView again and press DownArrow once

On the second and later uses of ListView:

• The first DownArrow press appears to do nothing visually.
• No entry is highlighted.
• Pressing Enter accepts or runs the first list item, indicating that the selection changed internally.
• Pressing DownArrow a second time causes the visual highlight to appear.
• Subsequent UpArrow and DownArrow presses render correctly.

Expected behavior

• Each DownArrow press in ListView should visibly move the selection to the next prediction.
• On the first press, the first matching history entry should be highlighted immediately.
• The visible highlight and the internally selected item should always remain in sync.
• This should behave consistently every time ListView is opened while in Vi insert mode.

Actual behavior

• After ListView has been used once, reopening it in Vi insert mode produces no visible highlight on the first DownArrow press.
• The first item appears unselected, but it is selected internally.
• Pressing Enter accepts/runs that first item despite the missing highlight.
• A second DownArrow press makes the highlight appear, after which navigation renders normally.
• Pressing Esc and then i temporarily resets the behavior.