Pyroscope: unexpected matches when filtering falmegraphs

### What happened? adding more characters to the search bar on a flamegraph highlights more frames <img width="1699" height="1620" alt="Image" src="https://github.com/user-attachments/assets/e0cda448-a2e5-4653-aa99-85bb9406e521" /> <img width="1699" height="1620" alt="Image" src="https://github.com/user-attachments/assets/8654a184-b027-4d92-883a-02b08dde12f8" /> <img width="1699" height="1620" alt="Image" src="https://github.com/user-attachments/assets/57f6d124-2ca4-458f-996b-fa46dbcf7d45" /> ### What did you expect to happen? i see all matches even when using exact matches ### Did this work before? i don't know ### How do we reproduce it? 1. open Explore instead of Drilldown 2. find a flamegraph 3. filter for a frame matching a prefix of a frame with exact match; this matches only one frame 4. complete the filter using incorrect casing (lowercase -> uppercase, vice versa); this starts to match more frames ### Is the bug inside a dashboard panel? _No response_ ### Environment (with versions)? Grafana: Grafana Cloud (fast) OS: Macos Browser: Google chrome suspected cause by @ifrost https://github.com/grafana/grafana/pull/106347 ### Grafana platform? I use Grafana Cloud ### Datasource(s)? Pyroscope