On an on-topic note, TITIG's 20851 offset/bpm is off pretty bad. I'm pretty rusty with timing so just throwing that out there that the offset is very early and bpm possibly a bit fast.
edit: for the sake of finishing your map, temporarily (?) place an offset at 20910 and 22200 both at 179.5 bpm. It's probably not the correct way to handle it, but it should let you at least map the part at question.
edit: for the sake of finishing your map, temporarily (?) place an offset at 20910 and 22200 both at 179.5 bpm. It's probably not the correct way to handle it, but it should let you at least map the part at question.