To fully understand that incident you'll need the radio communication from the teams. Because it looked like both Latifi and Stroll was trying to let faster guys through, but at different stages. If you were to ask me who's fault it is, I would put it slightly on Latifi. I felt like his driving was more erratic. From almost stopping completely to flooring it afterwards. I get Stroll's intension of getting out of the way for the faster cars behind. (Should've looked in his mirror though.) And I can kinda understand that he was suprised to see Latifi on his inside given how much Latifi stopped the corner before.
A bit of a mess.