IOS app stuck on Launch Screen

I created an app in 4.24 and then migrated to 4.25 last month. I upload the app to test flight and when I open the app on my Iphone Xs its stays on the launch screen, It is stuck, I cannot do anything else, it just stays on the launch screen. and does not go to my default level, I have my default level on Main menu everything seems fine but does not load anything else but the launch screen, Can anyone please help me out, I am going crazy with this now!

So I tried many of the things, And turned out, UE 4.25.3 has a bug and if you switch to any other engine as I tried 4.26, it worked out. Although 4.26 has lot of internal bugs try any other version of unreal. It should work!