Crashlytics reported iOS errors

I am seeing the following errors periodically reported in Crashlytics for our iOS Xamarin forms version of an app using 3.0.0 of Couchbase Lite.

EXC_BAD_ACCESS KERN_INVALID_ADDRESS 0x0000000000000000
Crashed: tid_15303
0 CoreFoundation 0x11cf8 CFNumberGetValue + 104
1 MyApp.iOS 0x20b0938 wrapper_managed_to_native_Couchbase_Lite_Support_IOSProxy_CFNumberGetValue_intptr_int_void_ + 4404300088
2 MyApp.iOS 0x2008584 Couchbase_Lite_Support_IOSProxy_CreateProxyAsync_System_Uri + 89 (IOSProxy.cs:89)
3 MyApp.iOS 0x2039aec Couchbase_Lite_Sync_WebSocketWrapper__connectProxyAsyncd__38_MoveNext + 321 (WebSocketWrapper.cs:321)
4 MyApp.iOS 0x5706c0 wrapper_runtime_invoke_object_runtime_invoke_dynamic_intptr_intptr_intptr_intptr + 4375725760
5 MyApp.iOS 0x2e94e38 mono_jit_runtime_invoke + 3191 (mini-runtime.c:3191)
6 MyApp.iOS 0x2f4ea68 mono_runtime_invoke_checked + 3052 (object.c:3052)
7 MyApp.iOS 0x2e79bf4 mono_gsharedvt_constrained_call + 1436 (jit-icalls.c:1436)
8 MyApp.iOS 0x575830 wrapper_managed_to_native_object___icall_wrapper_mono_gsharedvt_constrained_call_intptr_intptr_intptr_intptr_intptr + 4375746608
9 MyApp.iOS 0x4a80e4 System_Runtime_CompilerServices_AsyncVoidMethodBuilder_Start_TStateMachine_GSHAREDVT_TStateMachine_GSHAREDVT_ + 4374905060
10 MyApp.iOS 0x2035800 Couchbase_Lite_Sync_WebSocketWrapper_connectProxyAsync_Couchbase_Lite_DI_IProxy_string_string + 4403795968
11 MyApp.iOS 0x2038d94 Couchbase_Lite_Sync_WebSocketWrapper__Startb__31_0 + 246 (WebSocketWrapper.cs:246)
12 MyApp.iOS 0x200ab24 Couchbase_Lite_Support_SerialQueue_ProcessAsync + 187 (SerialQueue.cs:187)
13 MyApp.iOS 0x2d30f0 System_Threading_Tasks_Task_InnerInvoke + 4372984048
14 MyApp.iOS 0x2d2e04 System_Threading_Tasks_Task_Execute + 4372983300
15 MyApp.iOS 0x2d3078 System_Threading_Tasks_Task_ExecutionContextCallback_object + 4372983928
16 MyApp.iOS 0x2b443c System_Threading_ExecutionContext_RunInternal_System_Threading_ExecutionContext_System_Threading_ContextCallback_object_bool + 4372857916
17 MyApp.iOS 0x2b423c System_Threading_ExecutionContext_Run_System_Threading_ExecutionContext_System_Threading_ContextCallback_object_bool + 4372857404
18 MyApp.iOS 0x2d7e58 System_Threading_Tasks_Task_ExecuteWithThreadLocal_System_Threading_Tasks_Task_ + 4373003864
19 MyApp.iOS 0x2d2f90 System_Threading_Tasks_Task_ExecuteEntry_bool + 4372983696
20 MyApp.iOS 0x2df0a8 System_Threading_Tasks_ThreadPoolTaskScheduler__c___cctorb__10_0_object + 4373033128
21 MyApp.iOS 0x2b6b90 System_Threading_ThreadHelper_ThreadStart_Context_object + 4372867984
22 MyApp.iOS 0x2b443c System_Threading_ExecutionContext_RunInternal_System_Threading_ExecutionContext_System_Threading_ContextCallback_object_bool + 4372857916
23 MyApp.iOS 0x2b423c System_Threading_ExecutionContext_Run_System_Threading_ExecutionContext_System_Threading_ContextCallback_object_bool + 4372857404
24 MyApp.iOS 0x2b41c0 System_Threading_ExecutionContext_Run_System_Threading_ExecutionContext_System_Threading_ContextCallback_object + 4372857280
25 MyApp.iOS 0x2b6c20 System_Threading_ThreadHelper_ThreadStart_object + 4372868128
26 MyApp.iOS 0x5706c0 wrapper_runtime_invoke_object_runtime_invoke_dynamic_intptr_intptr_intptr_intptr + 4375725760
27 MyApp.iOS 0x2e94e38 mono_jit_runtime_invoke + 3191 (mini-runtime.c:3191)
28 MyApp.iOS 0x2f4ea68 mono_runtime_invoke_checked + 3052 (object.c:3052)
29 MyApp.iOS 0x2f54404 mono_runtime_delegate_try_invoke + 4441 (object.c:4441)
30 MyApp.iOS 0x2f9c6b8 start_wrapper_internal + 1258 (threads.c:1258)
31 MyApp.iOS 0x2f9c444 start_wrapper + 1310 (threads.c:1310)
32 libsystem_pthread.dylib 0x3348 _pthread_start + 116
33 libsystem_pthread.dylib 0x1948 thread_start + 8

Device

Model:iPhone 11 Pro

Orientation: Face Up

RAM free: 104.36 MB

Disk free: 3.14 GB

Operating System

Version:15.5.0

Orientation: Portrait

Jailbroken:No

This seems related to proxy settings on the device. Do you have any information on what those would be?