Today, I've discovered a bug with "Just Another Story" where you fail it for no apparent reason. I've got about 500 hours played at this point. This bug has happened on two vehicles that I tried to drive to El Capitan's choom. I do not use any mods.
The first time the quest failed, I was on the fourth attempt (using autosaves) when I'd had no accidents, had plenty of time left on the timer, and the quest failed as I was driving. The next attempt on a different vehicle was successful. The one after, I didn't have any additional conditions on the turn-in, just drive there after killing all the gangoons, and again the quest failed for no apparent reason. You'll get the call from El Capitan saying you f***ed up, the end.
I turned in several vehicles yesterday with no problems, and today was the first time I've ever seen this particular bug.