I just submit my app to the appstore but apple reject it because We were unable to review your app as it crashed on launch. We have attached detailed crash logs to help troubleshoot this issue.
Here link to the crash log link text
My solution is change Max mental shader standard to target in Project Setting, some build with mental 1.0 and 1.2 pass, and some still got reject. I still dont understand why, but it work quite randomly
dear gunmaster, I am having the same issues now with apple. I use ue4.20 and have received the metal.completionqueuedispatch threat error just like you. Do you have a final, absolut solution to this issue? Otherwise I will try Metal 1.2 (even though When Building with Metal 2.0 my first app was accepted): I really would not like to spam apple with my ever crashing apps (PS: after adking apple About more Information they told my that it works on many devices, my iPhone 8 and iPhone 6s for example BUT it crashed on iPadAir(which uses the firs 64 bit A7 processor, lowest supported Hardware)