Invulnerable Firebase

Earlier I played a game where a support set a firebase right in the middle of spunky arena, and it somehow became invulnerable. It didn't get stunned at all by my product grenade, and nothing I did would damage it. The health bar never even showed up.

I don't know how it got that way, and the support didn't even seem to realize that it was invulnerable. Anyone else seen this?

Was it shooting back at you?

never seen it.

However, I've seen a tank that was juiced not be able to damage our lazerblazer or was it a longshot? Dunno...

yeah, that's how I know I couldn't stun it with the PG

it pretty much won the game for them

I've seen Firebases "sunk" into the ground before, or thrown half-way into walls. An Airstrike can take them out if they can still shoot, and most of the time they can only shoot in one direction anyway.

Were the teams balanced at any point in the game?