Spiders from Strange Barrel Strongbox immune to damage

I was running maps with Containment scarabs and I tend to open many strongboxes at the same time.

When I opened a Strange Barrel and while the waves of spiders had yet to spawn, I clicked a strongbox which happened to have "revives nearby monsters with Onslaught." Now that box has revived those spiders and the spiders cannot be damaged or targeted in anyway and the box that revived them remains locked. The spiders also still have collision.

Leaving and re-entering the zone changes nothing

Reference ID: 1,875,399,389