Lowercase "f" and "i" are stuck together.

[Devolv]

Screenshot captured via Google Fonts:

The lowercase letters of "f" and "i" have no kerning space between them. Makes it look weird with the top of the "f" connecting perfectly with the dot on the "i". The horizontal line in "f" also connects perfectly with the lower vertical portion of the "i". Makes the entire shape look like a different glyph entirely.

[eliheuer]

This is a ligature, it can be disabled in your typesetting software, or in css:

* {
  font-variant-ligatures: none;
}