Search in Notes stopped working on MacBook Air after macOS Sequoia 15.5

I am on Mac OS Sequoia 15.5. I can't tell exactly if this started with 15.5 update but I have a strong feeling that it did.

While notes results appear in Spotlight search results, search inside the Notes app does not work - it does not return anything.

I tried disabling and enabling iCloud sync. All notes were redownloaded but it didn't help.

I tried "sudo mdutil -Eia off" but it gave me this error: "Error: unexpected indexing state (a)".

Then I tried reindexing Spotlight, by adding and removing Macintosh HD to Search Privacy. I let reindexing to be completed. But nothing changed. Notes results appear in search results but search inside Notes doesn't work.

Any advice?

[Re-Titled by Moderator]