I’ve noticed that the primary font on the Zwift website, Muller, doesn’t seem to render letters with an even height.
You can see examples here (from About Zwift | Zwift Newsroom):
This screenshot is from Chrome at default size, and it’s the same in Firefox.
Zooming in, it’s even clearer, but those letters with a straight leg are rendered shorter than others.
I find this makes the text harder to read for me, and I wonder if it could cause particular problems for others too. Might be worth considering a different font to improve readability.