Adobe Spark article and web app give different sizes for Twitter in-stream images?

What gives?

Adobe says on a blog post that the Twitter in-stream image size is 16:9 proportion (1200 x 675). See article here titled, "The ultimate guide to Twitter image sizes 2021."

HOWEVER...

If you go into the Spark web app, and click the Twitter size for your graphic, it's 1200 x 670 (16:8). It's 5px I know, but still odd there is this inconsistency.

Am I missing something or is this an error on Adobe's part?