Here's my take on your incident Vince and Julius.
Firstly Julius, I dont know if you were here at the time but the line you took on the start finish straight was a no-no, We had agreed in Season 11 that we would use that line during Qualifying laps only, During race that line is only to be used if defending a position. The reason we dont use it is that its an unnatural line and also a time gain, It makes it hard also for people to know if your defending or not, i.e have you had your 1 lane change?. No big deal here but just so as you know from now on, To be honest i dont even use that line in Qualifying anymore, Most just stick to the normal racing line.
The incident itself.....
Julius was late on the brakes, A big factor could be slipstream effect and loss of downforce when tucking back in behind Vince in the braking phase, Vince could do nothing else on the entry to turn 1, Vince followed the line he takes on any other lap to turn 1, The late brake and contact isnt a huge incident and its obvious Julius didnt mean to hit Vince but here's where it changes.....
In turn 2 after the incident Julius your first thoughts should be to give the place back, I see no hint of a lift or brake or slow to wait for Vince?, Admittedly Vince's re-join and straight onto the racing line is a bit dubious but i feel Vince wouldve expected you to lift or brake to let him retake the racing line.
What id do diffrently in this situation is obviously Julius needs to be a bit more carefull braking into turn1, Which itself wasn't a huge incident, We've all had it happen, The rejoin by Vince could be a bit more measured, you could give a bit more room to see if Julius will wait or not.
The main part of this incident needs some explaining by Julius though to find his thoughts i.e Why didnt he wait? What was his thoughts on turn1? Did his thoughts here contribute to why he didnt wait?.