While playing Squad Deathmatch, some players are blue

battlefield-4

That's a bug. You're right that all icons should be green / squad's color.

Related

How do I disable the "Save to network" option on OpenTTD for Android?
What is this shooting game that looks like Ukraine?
Which DOS game do these sprites of a little character and dragon come from?
Can I move/watch my PlayStation Videos without my PlayStation?
What's the purpose of elite caravans in the desert
Is there a hotkey for the crafting window?
How do I load all addons, even if I am not subscribed to it (but have it downloaded already)?
Are all glitches from the original games still present on the NES Classic Mini?
Why can't I make the HRE elective?
Why does breaking wood blocks have such a delay in minecraft, and how do I fix?
"Maximum Distance Exceeded" error when plotting course for passenger mission in Elite Dangerous
Can a full damage Ranger survive in the late game?