Search highlight disappears on blob view
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## How to reproduce
1. Open https://gitlab.com/gitlab-org/gitlab-services/design.gitlab.com/-/blob/main/packages/gitlab-ui/src/tokens/build/css/tokens.css?ref_type=heads
2. Scroll to the middle of the page
3. Select some property and copy its value
4. Scroll back to top
5. Refresh the page
6. Hit Ctrl+F
7. Paste the value
8. Observe scrolling to the right place, seeing the highlight for 1-2 frames
9. Observe highlight lost immediately after that
Epectation: you're scrolled to the search match and the highlight is applied to the text
Reality: you're scrolled to the search match but the highlight is immediately removed

issue