Unfortunately, it seems a bunch of people have the same problem, see the thread:
'Flexgate': 2016 and Newer MacBook Pro Users Report Display Issues Due to Fragile Flex Cables
https://forums.macrumors.com/thread...ay-issues-due-to-fragile-flex-cables.2166322/
Make Apple fix it.
Show them this video:
Show them this website: http://flexgate.me
Make sure you sign this petition
If they won't fix it for free onsite call Apple customer support and demand they repair it.
Out of curiosity - how often do you open the lid - and when you do, how far do you normally open it?
Ouch...
Display failure...
Hopefully you have AppleCare and/or Apple makes it right and replaces it...so that it can happen again.
When I do open it up I very rarely go all the way back.