Reselecting the search field breaks the arrow key navigation 🐛

[dns2utf8]

Hi @jsha & @GuillaumeGomez

With the latest nightly, generate some documentation and search for something

• For example: https://data.estada.ch/rustdoc-nightly_4e3e6db01_2021-05-18/multiplayer_snake/index.html?search=sender
• Type s to get into the input field
• Press ↓↓→ tree times
• Type s to get back to the input field
• Delete two characters so it searches for send
• Wait 500ms (you can go down in the first 500ms but then the bug triggers anyways and nothing is selected)
• Press ↓ again (and again)

I expected to see this happen: Select the first entry again

Instead, this happened: Nothing

Cheers
Stefan

Meta

This is a follow up to #84462

rustc --version --verbose:

rustc 1.54.0-nightly (4e3e6db01 2021-05-18)