Can't copy issue titles

### Product

axe-core

### Product Version

4.6.3

### Latest Version

- [X] I have tested the issue with the latest version of the product

### Issue Description

axe DevTools 4.49.03
axe-core 4.6.3
macOS 13.3.1 (a)
Firefox 112.0.2

#### Expectation
I can select the title of an issue and copy the text.

#### Actual
I can't select the title of an issue and copy the text.

#### How to Reproduce
In Firefox with axe-core enabled:
1. Go to a page that has multiple errors. (https://www.sfmta.com/system/test-page-accessibility-errors)
2. In the Tools menu, choose Browser Tools.
3. Choose Web Developer Tools.
4. Click on the axe DevTools tab.
5. Click start new scan.
6. Click Scan all of my page
7. Wait for the results to appear
8. Attempt to select the text "Frames must have an accessible name"

Expected result: The text is highlighted as having been selected and I can copy it.
Actual result: The text is not highlighted as having been selected and I have no way to copy it.

#### Additional context
None