Three Leaf Clover mission bugged??

[LanreAnkotte]

Entire thing is a spoiler ig so

Spoiler

I've seen a lot of posts about Packie and Derrick standing still, but rarely about them taking off at the speed of sound...I get to the tunnel and they stop, start shooting and saying "we can't let them pin us down" and then they turn around and start running like the flash. I run at full sprint and these guys are tearing ahead of me like their lives depend on it or something, they disappear and it says I abandoned them. I figured it was just an unfortunate bug and it had taken me ten full minutes to get to that point with a quarter of my health bar so I decided to try again. I restarted my entire console and booted up the game, drove to mission start, drove to the bank, etc etc etc, did the entire mission again and lo, they take off like the flash is on their asses. Actually too fast to track, I was ready for it this time and they ran like someone had sped up their animations with a blender program by 50. I tried it one more time and the same thing happened, no issues till the tunnel and then they disappear and the game fails me and makes me start from the very beginning (like come on, no checkpoints or anything wtaf). Any ideas for a fix? I'm pretty much softlocked here since there are no other story missions to do.