Yank functionality not working in Brave Browser

Describe the bug:
I'm having issues with the "yank" functionality in Vimium for Brave; in particular, yy and yf. When I press yy the extension does report that the value of the URL has been yanked: see this screenshot. Same applies for yf; when I enter yf and chose a link, it reports that the desired link has been yanked: see this screenshot.

However, when I try to access the clipboard using CMD + v -- the value of the clipboard is not the one yanked by Vimium, rather it contains the old value (the texts that I manually copied using CMD + c or Right-click -> Copy Link Address for example).

To Reproduce:

1. "Yank" a URL (using either yy or yf)
2. Go to another tab
3. Use CMD + v to paste the URL to test if Vimium modified the clipboard.

Brave Browser Version: Version 1.52.130 Chromium: 114.0.5735.198 (Official Build) (arm64)

Platform: macOS 13.4.1

Vimium version: 1.67.7

Start by reproducing the issue in Brave 1.52.130 on macOS 13.4.1 with both yy and yf, then compare the reported yanked value with what CMD + v pastes in another tab. Done means both commands place the selected URL or link in the system clipboard rather than retaining the previous copied value.