[REG 5.15.2 -> 5.15.3] DevTools do not highlight elements when hovering

Steps to reproduce:

1. Open Simple Browser or Quick Nano Browser
2. Right click on the page and select "Open Inspector in new window"
3. Hover over elements in the source code.

Expected result:
Hovered elements get a blue highlight in the original browser window

Actual result:
No highlight visible

The rest of the DevTools seems to work as expected.