Relics respawn at enemy bases. I was guarding our base and enemy relic appeared right in front of it. No other players were around. And later our relic respawned at emeny base - it was on our base, then dissapear, we get message about green took our relic and one second later it was placed. So it was twice in one match. Most of the time relics respawn correctly.
@ZOS_GinaBruno