I was just creating this report myself but found this one already exists. To help make it even clearer, here is a perfect circle overlaid on top of the search icon, showing the icon has been stretched horizontally:
And here is a zoomed-in version of the bookmark icon, showing it is not pixel aligned even on a high-DPI display:
Hopefully resolving these issues and making the icons use the same line width as the system ones will also help make them appear more optically equally sized as the other icons, as right now the bookmark icon in particular feels much larger than the system icons.
