The Glitch:
On the level Corporate Collapse, Right after the part where you *this is the only Spoiler* defeat the first PINGER. *end Spoiler* the blue objective reticule appears over Chico and the vehicles with the objective marked as "Rejoin Chicoin the cafe: Regroup at the vehicles"
When this happens, Alcatraz's animations become severely limited, in that he can no longer shoot, high-jump, use grenades or attachments, ledge climb, or even slide. all I can do is use active camo and armor, and walk around collecting left-over ammo from the previous battle.
There are no places to advance and the only backtrack way is a drop (which you cannot return from, having lost the ability to ledge climb due to this glitch)
I have both killed and been killed by the Pinger several several times. On both reloads, and reboots. The result is the same. No matter the strategy/weapons used to defeat him. and regardless of whether I pick up the 2000 Nanite reward or not.