It sometimes happens that Phoenix’s blue circle indicating the range of his healing pulse remains in one place for the remainder of the game. It looks like this:
I reproduced the bug by charging my healing pulse during the warmup. The warmup ended while I was in the middle of charging and the game skipped to the opening cinematic. When I spawned on the map again to begin the match, the aura was visible where it was last seen before being interrupted by the end of warmup.