I finally got this to work. I don't know if it will help anyone else, but this is how I done it. Using Franklin, I did drive to the B marker and received the disrupted message.
I did drive out of the area, until the B marker re-appeared. Then I did drive back to the B marker and this time the mission worked. I hope this information helps someone.

If is doesn't work with car try with Franklin again but this time use helicopter, fly to the point B ( of course doesn't will be work again ) then fly away over the sea until the B comes back again then fly back. Should be working the mission.

31/08/2017
Hi everyone, I have a lot messages from you. All are very nice and I'm very glad I did help you with the bug. Some people was stuck for 6 months some of them for weeks. I can feel from your comments how happy you are because you can carry on playing the game. I can't to every each one send message you are welcome. That is why I did write this comment. Thank you very much for all the nice comments and you are all very welcome. Sydney R

свернуть