Search does not reveal all of the found notes until you click in the results list. See this video and note two last notes on the results list, which are not available right after the search until you click in the results list.
Edit: At first I was thinking this is related to search by tags, but looks like this happens when searching anything: video.
- Operating system: macOS Big Sur
- Obsidian version: 0.8.0, no CSS