What does yellow border around component in KiCad Pcbnew mean?
Looks more like an courtyard outline on the wrong layer - in your setup the faint grey lines are the courtyard (some footprints don't have them, depending on your source and the age of the library you use, or if they are entirely DIY).
For that device the designer might have accidentally put the courtyard onto the same layer as the value of the part.
It's hard to tell as we can't see your layer color choices.

PS: I know this is nearly 24 months old, but it comes up as unanswered.