realm-swift: Crash when adding new objects during a write transaction on same thread

I recently upgraded my project from Realm 0.95.3 to 0.96.2, and now I’m seeing crashes when adding objects while another function is updating the default Realm.

Crash Logs for the relevant thread:

Thread : Crashed: com.apple.root.default-qos
0  flare                          4297133284 RLMAddObjectToRealm (table.hpp:1698)
1  flare                          4295357400 __32+[FLPerson updateFollowersInfo:]_block_invoke    (FLPerson.m:539)
2  libdispatch.dylib              6855022312 _dispatch_call_block_and_release + 24
3  libdispatch.dylib              6855022248 _dispatch_client_callout + 16
4  libdispatch.dylib              6855080768 _dispatch_root_queue_drain + 2140
5  libdispatch.dylib              6855078620 _dispatch_worker_thread3 + 112
6  libsystem_pthread.dylib        6857200752 _pthread_wqthread + 1092
7  libsystem_pthread.dylib        6857199648 start_wqthread + 4



Thread : com.apple.root.default-qos
0  libsystem_kernel.dylib         6856388496 __psynch_mutexwait + 8
1  libsystem_pthread.dylib        6857221020 _pthread_mutex_lock_wait + 96
2  flare                          4298442652 realm::util::RobustMutex::low_level_lock() + 1292
3  flare                          4299063588 realm::SharedGroup::do_begin_write() + 7392
4  flare                          4297151420 RLMPromoteToWrite(realm::SharedGroup&, realm::History&, RLMSchema*) (group_shared.hpp:914)
5  flare                          4297457840 -[RLMRealm beginWriteTransaction] (RLMRealm.mm:579)
6  flare                          4295359692 +[FLPerson resetBlockingList] (FLPerson.m:639) 
7  flare                          4295357832 __45+[FLPerson updatePeopleCurrenUserBlocksInfo:]_block_invoke (FLPerson.m:556)
8  libdispatch.dylib              6855022312 _dispatch_call_block_and_release + 24 
9  libdispatch.dylib              6855022248 _dispatch_client_callout + 16
10 libdispatch.dylib              6855080768 _dispatch_root_queue_drain + 2140
11 libdispatch.dylib              6855078620 _dispatch_worker_thread3 + 112
12 libsystem_pthread.dylib        6857200752 _pthread_wqthread + 1092
13 libsystem_pthread.dylib        6857199648 start_wqthread + 4