[BUG] Typing in a paren resets filtering in the coverage reports widget on the commit page

[webknjaz]

Describe the bug

When on https://app.codecov.io/gh/python-trio/trio/commit/4f66fabf5ca4c2dd40e4e9b76bc486a78483d159, in Coverage reports history, there's a filter input.
This widget has report titles like macOS (pypy-3.10).

Entering macOS works and shows the matching entries. The problems begin when I attempt to be more accurate and filter out more things.
Entering macOS ( (with the intent to enter the full string of macOS (pypy-3.10)) clears the input field entirely, deleting everything in it, as soon as I hit (.

Expected behavior

The filter input shouldn't be reset and allow entering whatever is being typed in without clearing the filters on random keypresses…

P.S. Entering macos does not match anything. I imagine that most people would expect it to be case-insensitive.
P.P.S. It'd be nice to be able if the filter was fuzzy, allowing comma-/whitespace-separated tokens to match different flags or both flags and titles.