John Seed boss fight won't start

[Haylbal]

Hi,
So after I completed the last quest i needed to fight John Seed i fast-traveled to Fall's End (because that's where the mission was located). I was in radio chatter with Johnny Boy, but when I got there the church and the rest of the town remained the same.
Could someone please help me out with this?
Thanks.

[Krucht]

Hey , try to fast travel to the first island on the first mission , after that john seed will call u on the radio the mission start again [note : u have to restared the game first]

[Haylbal]

ok thanks

[Yautja Hunter]

I am on version 1.5.0 with the same issue. I have tried travelling to other islands, doing other primary and side missions - the John Showdown mission just won't start. The church and the city are empty. I am very frustrated and don't know what to do. Please advise.

[Yautja Hunter]

OK, got it solved. Had to do the Air Raid mission which on it's own is a bug. It was on my list but the marker was not on the map so I didn't quite understand what I had to do. So I watched walk-through for that mission on youtube just to understand how I can start it. Once I boarded that yellow plane the Air Raid mission started, but the in the middle of the flight I got knocked out by a bliss/drug and another mission started. Once I completed it and then got knocked out by a bliss AGAIN to find myself in a bunker. Once I got out, John Seed finally radioed in and I could start that damn mission.

[metallica#1fan]

i got into the plane to fight him but it just disappeared and i cant find him what so ever