Environment

Cascadia Code version number: 2102.25
Application (with version) used to display text: VSCode 1.54.3 and Windows Font Settings
OS platform and version: Windows 10 Pro 20H2
Screen resolution (i.e. 220dpi): 163 dpi

Any other software?

Steps to reproduce

1. Install Cascadia Code
2. Type == in either vscode or the windows font preview

I tried this on a much older version of Cascadia code, version 1911.20 and it worked as expected. Does not work on the later versions.

Expected behavior

1. Expect ligature for == to show

Version 2102.25

Version 1911.20

Actual behavior

1. No ligature shows as seen in first image

Only happens for the == ligature as far as I know as ===, !=, etc all work fine.