In link-hint filtering mode, the link is not activated even though 'Require Enter' is unchecked

Describe the bug

In link-hint filtering mode, the doc says "if there's only one candidate left, the link will be activate automatically" (ref), but it doesn't.

In Vimium options - Miscellaneous options, I did:

• check: Use the link's name and characters for link-hint filtering
• uncheck: Require Enter when filtering hints

Expected behavior

When there's only one applicable link left, the link is activated automatically.

Side note

• When I checked Use the link's name and characters for link-hint filtering, Characters used for link hints is changed to 0123456789
• When there become only one link by typing digits, it activated automatically.

To Reproduce

Steps to reproduce the behavior:

1. Set two options like above
2. Open https://github.com/philc/vimium
3. f -> pu
4. There is (I hope) only one link left, the 'Pull Request' tab. but it only get highlighted and not activated. To activate the link, I have to type additional 1.

Verions

• Chrome: 134.0.6998.89 (arm64)
• Vimium: 2.1.2

Reproduce the issue in Vimium's link-hint filtering mode with link-name filtering enabled and Require Enter disabled, following the steps in the report. Trace the filtering entry point and compare the automatic activation path for typed digits with the path after typing link text; done means the sole remaining link activates in both cases.