BUG: popup window cutoff unless popup_border_style option is set

[johnpitchko]

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• I have read all the docs.
• I have searched the existing issues.
• I have searched the existing discussions.

Neovim Version (nvim -v)

0.10.2

Operating System / Version

MacOS Sequoia 15.0.1 (24A348)

Describe the Bug

The top half of the popup window is cut off. That is, after opening the popup window in Neotree, such as when adding a new file or renaming a current one, the top half of the popup window is missing. The window still works - it collects and echos user input and adds/renames file correctly.

Setting the popup_border_style = "rounded" option for Neotree appears to resolve this issue; the full popup window is rendered.

Screenshots, Traceback

Steps to Reproduce

1. Clear/unset any popup_border_style value.
2. Open Neotree.
3. Press a to add a new file or r to rename file under cursor.
4. Observe window top appears cut off, or border is missing, and font is very faint.

Expected Behavior

Border surrounds entire window; font is visible.

Your Configuration

return {
  "nvim-neo-tree/neo-tree.nvim",
  cmd = "Neotree",
  branch = "v3.x",
  dependencies = {
    "nvim-lua/plenary.nvim",
    "nvim-tree/nvim-web-devicons", -- not strictly required, but recommended
    "MunifTanjim/nui.nvim",
    -- "3rd/image.nvim", -- Optional image support in preview window: See `# Preview Mode` for more information
  },
  keys = {},
  opts = {
    close_if_last_window = true
  },
}

[junghochoi]

Can confirm that this issue is reproducible. Popup windows were working fine until I updated my neovim plugins