I am getting occasional hangs in our app whilst entering data into a UITextField displayed in a Popover. I think it has something to do with either a KVO Observer or a making Layout affecting changes in LayoutSubviews but I do not know as the Stack Trace is next to useless and I get no handled exception.

Can anyone give me some suggestions on where to look for more info?

This is what I get in Output Window of Visual Studio

[0:] MultilineEntryTextField Content >= MaxHeight. Scroll Disbaled
2018-02-27 17:42:05.359 OurNameSpace[444:84807] critical: Stacktrace:
2018-02-27 17:42:05.359 OurNameSpace[444:84807] critical: at <0xffffffff>
2018-02-27 17:42:05.359 OurNameSpace[444:84807] critical: at (wrapper managed-to-native) UIKit.UIApplication.UIApplicationMain (int,string[],intptr,intptr) <0x00007>
2018-02-27 17:42:05.359 OurNameSpace[444:84807] critical: at UIKit.UIApplication.Main (string[],intptr,intptr) [0x00005] in /Users/builder/data/lanes/5665/db807ec9/source/xamarin-macios/src/UIKit/UIApplication.cs:79
2018-02-27 17:42:05.359 OurNameSpace[444:84807] critical: at UIKit.UIApplication.Main (string[],string,string) [0x00038] in /Users/builder/data/lanes/5665/db807ec9/source/xamarin-macios/src/UIKit/UIApplication.cs:63
2018-02-27 17:42:05.359 OurNameSpace[444:84807] critical: at Our.Namespace.Touch.Application.Main (string[]) [0x00002] in C:\Projects\AA\Patient Hub Framework SCRUM\main\Our.Namespace.iOS\Main.cs:32
2018-02-27 17:42:05.359 OurNameSpace[444:84807]
critical: at (wrapper runtime-invoke) object.runtime_invoke_dynamic (intptr,intptr,intptr,intptr) [0x0001e] in <d680a8bf3a2a4c8dbbfde665ba81f6f2#25944FAB-44A8-FC3F-9401-3D0B206E68A0>:0
2018-02-27 17:42:05.360 OurNameSpace[444:84807] critical:
Native stacktrace:
2018-02-27 17:42:05.760 OurNameSpace[444:84807] critical: 0 OurNameSpace 0x0000000104f2e868 mono_handle_native_crash + 224
2018-02-27 17:42:05.760 OurNameSpace[444:84807] critical: 1 OurNameSpace 0x0000000104f3b014 mono_sigsegv_signal_handler + 316
2018-02-27 17:42:05.760 OurNameSpace[444:84807] critical: 2 libsystem_platform.dylib 0x0000000184773b50 _sigtramp + 52
2018-02-27 17:42:05.760 OurNameSpace[444:84807] critical: 3 Foundation 0x0000000185513fe0 + 68
2018-02-27 17:42:05.760 OurNameSpace[444:84807] critical: 4 Foundation 0x0000000185513dc0 + 320
2018-02-27 17:42:05.760 OurNameSpace[444:84807] critical: 5 Foundation 0x0000000185459858 + 60
2018-02-27 17:42:05.761 OurNameSpace[444:84807] critical: 6 Foundation 0x0000000185511c48 + 284
2018-02-27 17:42:05.761 OurNameSpace[444:84807] critical: 7 UIKit 0x000000018e3266d8 + 136
2018-02-27 17:42:05.761 OurNameSpace[444:84807] critical: 8 UIKit 0x000000018e083e3c + 80
2018-02-27 17:42:05.761 OurNameSpace[444:84807] critical: 9 UIKit 0x000000018e030f00 + 1276
2018-02-27 17:42:05.761 OurNameSpace[444:84807] critical: 10 QuartzCore 0x0000000188b95998 + 184
2018-02-27 17:42:05.761 OurNameSpace[444:84807] critical: 11 QuartzCore 0x0000000188b99b20 + 332
2018-02-27 17:42:05.761 OurNameSpace[444:84807] critical: 12 QuartzCore 0x0000000188b0636c + 336
2018-02-27 17:42:05.761 OurNameSpace[444:84807] critical: 13 QuartzCore 0x0000000188b2db90 + 540
2018-02-27 17:42:05.761 OurNameSpace[444:84807] critical: 14 QuartzCore 0x0000000188b2e9d0 + 92
2018-02-27 17:42:05.761 OurNameSpace[444:84807] critical: 15 CoreFoundation 0x0000000184af9edc +
32
2018-02-27 17:42:05.761 OurNameSpace[444:84807] critical: 16 CoreFoundation 0x0000000184af7894 + 412
2018-02-27 17:42:05.762 OurNameSpace[444:84807] critical: 17 CoreFoundation 0x0000000184af7e50 + 1292
2018-02-27 17:42:05.762 OurNameSpace[444:84807] critical: 18 CoreFoundation 0x0000000184a17e58 CFRunLoopRunSpecific + 436
2018-02-27 17:42:05.762 OurNameSpace[444:84807] critical: 19 GraphicsServices 0x00000001868c4f84 GSEventRunModal + 100
2018-02-27 17:42:05.762 OurNameSpace[444:84807] critical: 20 UIKit 0x000000018e09767c UIApplicationMain + 236
2018-02-27 17:42:05.762 OurNameSpace[444:84807] critical: 21 OurNameSpace 0x0000000101f61ca0 wrapper_managed_to_native_UIKit_UIApplication_UIApplicationMain_int_string___intptr_intptr + 368
2018-02-27 17:42:05.762 PatientHubF
rameworkTouch[444:84807] critical: 22 OurNameSpace 0x000000010169113c UIKit_UIApplication_Main_string___intptr_intptr + 44
2018-02-27 17:42:05.762 OurNameSpace[444:84807] critical: 23 OurNameSpace 0x0000000101690ffc UIKit_UIApplication_Main_string___string_string + 172
2018-02-27 17:42:05.762 OurNameSpace[444:84807] critical: 24 OurNameSpace 0x0000000100adc950 Our.Namespace_Touch_Application_Main_string__ + 176
2018-02-27 17:42:05.762 OurNameSpace[444:84807] critical: 25 OurNameSpace 0x000000010129ebd4 wrapper_runtime_invoke_object_runtime_invoke_dynamic_intptr_intptr_intptr_intptr + 244
2018-02-27 17:42:05.762 OurNameSpace[444:84807] critical: 26 OurNameSpace 0x0000000104f3e14c mono_jit_runtime_invoke + 824
2018-02-27 17:42:05.762 OurNameSpace[444:84807] critical: 27 OurNameSpace 0x0000000104fba
7c0 do_runtime_invoke + 108
2018-02-27 17:42:05.763 OurNameSpace[444:84807] critical: 28 OurNameSpace 0x0000000104fbda64 do_exec_main_checked + 144
2018-02-27 17:42:05.763 OurNameSpace[444:84807] critical: 29 OurNameSpace 0x0000000104f21634 mono_jit_exec + 268
2018-02-27 17:42:05.763 OurNameSpace[444:84807] critical: 30 OurNameSpace 0x000000010509aee8 xamarin_main + 2220
2018-02-27 17:42:05.763 OurNameSpace[444:84807] critical: 31 OurNameSpace 0x0000000100ad60e8 main + 96
2018-02-27 17:42:05.763 OurNameSpace[444:84807] critical: 32 libdyld.dylib 0x000000018453456c + 4

2018-02-27 17:42:05.763 OurNameSpace[444:84807] critical:

Got a SIGSEGV while executing native code. This usually indicates
a fatal error in the mono runtime or one of the nat
ive libraries

used by your application.