Quicklook highlight isn't cleared for selected texts when followed by another quicklook

Steps to reproduce

1. Select multiple words and do quicklook.

2. Hover over a different word and invoke quicklook again.

3. And again.

Expected behaviour

The first quicklook highlight (ice cream) should clear when the second quicklook is invoked.

Version of MacVim

MacVim r182 (Vim 9.1.1887)

MacVim installation method

MacVim was downloaded from GitHub release and updated via Sparkle.

Environment

macOS: 15.7.3
14" MacBookPro (2023). Apple M2 Pro

Logs and stack traces

Vim and MacVim configuration where issue is reproducable

No response

How was MacVim launched?

• by launching MacVim.app in macOS (by using the Dock, Spotlight, or the open command)
• by running mvim/gvim in the terminal

Issue has been tested with clean configuration

• by running mvim --clean (or gvim, supplied by MacVim distribution). You can also use the File → "New Clean Window" menu item within MacVim.
• by running vim --clean (in terminal, supplied by MacVim distribution)
• by running vim --clean (in terminal, other suppliers, e.g. /usr/bin/vim)

首先，按照所述的选中文本并重复调用 quicklook 的步骤，在 MacVim.app 中复现该问题。跟踪 MacVim 源代码中对 quicklook 和 highlight 的处理，然后验证调用后续的 quicklook 会移除之前的高亮，同时保留当前的高亮。