I did not yet had the chance to exchange my display using the coating program. My problem is getting worse. I don’t have any apple nearby as I am traveling and the only chance is to give it to an authorized service for a minimum of 2 weeks for repair. If it would be a 2016 model, apple would replace it outside warranty as well: https://www.apple.com/support/13-inch-macbook-pro-display-backlight-service/ but people are facing the same issue with 2017 model (just like mine). Some are mentioning T-CON board issue, is that related to it? What is the T-CON and where is it located?
Same problem for me, mostly happens when MacBook is heating up. When I start using it there is no issue but after like 20-40 minutes it appears. I hope there will be a service program at some point. 2017 MacBook Pro