Editor font rendering has significant aliasing on mixed-DPI

The default font rendering suffers from significant aliasing:

With Zoom at 100%:

Text looks terrible and even worse, the "=" is almost indistinguishable from "-".

Editor Font preferences are at defaults:

• Font Family "Source Code Pro"
• Size 9
• Zoom 100%
• Antialias ticked.
• "Flat" theme

Turning "Antialias" Off does not noticeably affect the appearance:
With Antialisaing Off, the appearance is 

Seen on the low-DPI screens of a mixed-DPI system.
Primary screen is 4k @ 200% scaling, secondary screens are 1080p at 100% scaling.

This seems to be new in v8.0.0.