[TIMOB-25466] setLargeTitleEnabled - unrecognized selector sent to instance

My mobile app contains 3 tabs and has been in production for a year now. Latest release was end of August and built on Ti 6.2.2GA. This morning I updated to 6.3.0RC and deployed to my iPhone 7 Plus running iOS 11. After running for 30 seconds, and flipping between a few tabs, the app crashes with: [ERROR] : The application has crashed with an uncaught exception 'NSInvalidArgumentException'. [ERROR] : Reason: [ERROR] : -[TiUIWindowProxy setLargeTitleEnabled:]: unrecognized selector sent to instance 0x1038d8800 [ERROR] : Stack trace: [ERROR] : 0 CoreFoundation 0x000000018143bd38 + 124 [ERROR] : 1 libobjc.A.dylib 0x0000000180950528 objc_exception_throw + 56 [ERROR] : 2 CoreFoundation 0x00000001814491f8 + 0 [ERROR] : 3 CoreFoundation 0x00000001814416e4 + 1380 [ERROR] : 4 CoreFoundation 0x00000001813270dc _CF_forwarding_prep_0 + 92 [ERROR] : 5 AmLINK 0x0000000102327440 AmLINK + 373824 [ERROR] : 6 AmLINK 0x0000000102320004 AmLINK + 344068 [ERROR] : 7 AmLINK 0x00000001022dbb78 AmLINK + 64376 [ERROR] : 8 UIKit 0x000000018a8645bc + 628 [ERROR] : 9 UIKit 0x000000018a864330 + 156 [ERROR] : 10 UIKit 0x000000018a8f0228 + 440 [ERROR] : 11 UIKit 0x000000018a8645bc + 628 [ERROR] : 12 UIKit 0x000000018a864330 + 156 [ERROR] : 13 UIKit 0x000000018a96fb74 + 1156 [ERROR] : 14 UIKit 0x000000018a96f6dc + 68 [ERROR] : 15 UIKit 0x000000018a96f538 + 400 [ERROR] : 16 UIKit 0x000000018a972290 + 112 [ERROR] : 17 UIKit 0x000000018aa256b4 + 392 [ERROR] : 18 UIKit 0x000000018a88020c + 96 [ERROR] : 19 UIKit 0x000000018aa254c0 + 528 [ERROR] : 20 UIKit 0x000000018a88020c + 96 [ERROR] : 21 UIKit 0x000000018a88018c + 80 [ERROR] : 22 UIKit 0x000000018a86af4c + 440 [ERROR] : 23 UIKit 0x000000018ade36a4 + 120 [ERROR] : 24 UIKit 0x000000018a88020c + 96 [ERROR] : 25 UIKit 0x000000018a88018c + 80 [ERROR] : 26 UIKit 0x000000018a86af4c + 440 [ERROR] : 27 UIKit 0x000000018a87fa80 + 576 [ERROR] : 28 UIKit 0x000000018a87f5a0 + 2544 [ERROR] : 29 UIKit 0x000000018a87aa70 + 3208 [ERROR] : 30 UIKit 0x000000018a84c078 + 340 [ERROR] : 31 UIKit 0x00000001a0118b58 + 100 [ERROR] : 32 UIKit 0x000000018b18bf98 + 2364 [ERROR] : 33 UIKit 0x000000018b18e408 + 4760 [ERROR] : 34 UIKit 0x000000018b187574 + 152 [ERROR] : 35 CoreFoundation 0x00000001813e4358 + 24 [ERROR] : 36 CoreFoundation 0x00000001813e42d8 + 88 [ERROR] : 37 CoreFoundation 0x00000001813e3b60 + 204 [ERROR] : 38 CoreFoundation 0x00000001813e1738 + 1048 [ERROR] : 39 CoreFoundation 0x00000001813022d8 CFRunLoopRunSpecific + 436 [ERROR] : 40 GraphicsServices 0x0000000183193f84 GSEventRunModal + 100 [ERROR] : 41 UIKit 0x000000018a8af880 UIApplicationMain + 208 [ERROR] : 42 AmLINK 0x00000001022d1e8c AmLINK + 24204 [ERROR] : 43 libdyld.dylib 0x0000000180e2656c + 4 -- End application log ------------------------------------------------------- Seeing "setLargeTitleEnabled" in the log, I assumed that must be the issue. Your doc says it defaults to "false" which is fine - I dont want to use it. But obviously, the SDK is doing something wrong. So I went ahead and decided to define it by adding this in app.tss to apply to every window. Window[platform=ios]": { largeTitleEnabled: false } Upon doing that, now the app won't even open - instantly crashes. So, I removed the .tss style I added, put tiapp.xml back to 6.2.2GA and the app runs perfect. It is definitely a 6.3.0RC issue. Please help as I really need to get on 6.3.0 so I can re-package for the upcoming iPhone X release. Thanks, Adam.