A bit more on iOS 11.3 breaking things
Motherboard just posted this great vid: The iOS 11.3 update broke iPhones that have some aftermarket touchscreens.
Update (04/24/2018)
Some good news! Apple has just released an update which they claim fixes the 3rd party display issue!
Apple Releases iOS 11.3.1 Update With Fix for Third-Party Display Repair Issue
Is this a worthwhile discussion?