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Thank you for the reply GlacierSec. :-)I've seen Alex T's response but haven't had time to look further into it yet. I've filed a feedback as FB7343085 if anyone from Apple notices this.

I've updated to iPadOS 13.2 and there's a slightly different trace:Exception Type: EXC_BAD_ACCESS (SIGBUS)Exception Subtype: KERN_MEMORY_ERROR at 0x0000000104d75c94VM Region Info: 0x104d75c94 is in 0x104d54000-0x104d78000; bytes after start: 138388 bytes before end: 9067 REGION TYPE START - END [ VSIZE] PRT/MAX SHRMOD REGION DETAIL __LINKEDIT 0000000104cec000-0000000104d54000 [ 416K] r--/r-- SM=COW ---> mapped file 0000000104d54000-0000000104d78000 [ 144K] r--/rw- SM=COW ...t_id=c76acaeb Kernel Alloc Once 0000000104d78000-0000000104d80000 [ 32K] rw-/rwx SM=PRVTermination Signal: Bus error: 10Termination Reason: Namespace SIGNAL, Code 0xaTerminating Process: exc handler [286]Triggered by Thread: 5Thread 5 name:Thread 5 Crashed:0 libdyld.dylib 0x00000001bc5505d0 dyld3::closure::ObjCStringTable::hash(char const*, unsigned long) const + 16 (Closure.cpp:1339)1 libdyld.dylib 0x00000001bc550be4 dyld3::closure::ObjCStringTable::getIndex(char const*) const + 52 (Closure.h:841)2 libdyld.dylib 0x00000001bc55097c dyld3::closure::ObjCStringTable::getPotentialTarget(char const*) const + 20 (Closure.h:825)3 libdyld.dylib 0x00000001bc550c50 dyld3::closure::ObjCClassDuplicatesOpt::getClassLocation(char const*, objc_opt::objc_opt_t const*... + 44 (Closure.cpp:1483)4 libdyld.dylib 0x00000001bc55d3cc dyld3::AllImages::forEachObjCClass(char const*, void (void*, bool, bool*) block_pointer) const + 72 (AllImages.cpp:1915)5 libobjc.A.dylib 0x00000001bc48fc28 getPreoptimizedClass + 148 (objc-opt.mm:279)6 libobjc.A.dylib 0x00000001bc47a7d8 getClassExceptSomeSwift(char const*) + 20 (objc-runtime-new.mm:1620)7 libobjc.A.dylib 0x00000001bc47b684 look_up_class + 100 (objc-runtime-new.mm:6880)8 BaseBoard 0x00000001bf30447c _BSXPCEncodeObjectForKey + 124 (BSXPCCoder.m:377)9 BaseBoard 0x00000001bf30428c -[BSXPCCoder encodeObject:forKey:] + 96 (BSXPCCoder.m:181)10 RunningBoardServices 0x00000001bf29f604 __44+[RBSXPCMessage messageForMethod:arguments:]_block_invoke + 288 (RBSXPCUtilities.m:152)11 RunningBoardServices 0x00000001bf29f35c +[RBSXPCMessage messageWithEncoder:] + 72 (RBSXPCUtilities.m:132)12 RunningBoardServices 0x00000001bf29f408 +[RBSXPCMessage messageForMethod:arguments:] + 148 (RBSXPCUtilities.m:140)13 RunningBoardServices 0x00000001bf29f788 +[RBSXPCMessage messageForMethod:varguments:] + 192 (RBSXPCUtilities.m:170)14 RunningBoardServices 0x00000001bf28f234 -[RBSConnection _invalidateAssertionIdentifier:error:] + 144 (RBSConnection.m:1361)15 RunningBoardServices 0x00000001bf28808c -[RBSConnection invalidateAssertion:error:] + 80 (RBSConnection.m:275)16 RunningBoardServices 0x00000001bf28605c -[RBSAssertion _clientInvalidateWithError:] + 124 (RBSAssertion.m:317)17 AssertionServices 0x00000001c0e6278c -[BKSAssertion _invalidateSynchronously:] + 104 (BKSAssertion.m:164)18 AssertionServices 0x00000001c0e6718c -[BKSProcessAssertion invalidate] + 92 (BKSProcessAssertion.m:291)19 Foundation 0x00000001bcb2e624 ___NSExtensionTearDownRequestWithIdentifier_block_invoke_2 + 84 (NSExtension.m:1098)20 PlugInKit 0x00000001c9e6db4c -[PKHostPlugIn endUsing:] + 152 (PKHostPlugIn.m:814)21 Foundation 0x00000001bcb2d090 __64-[NSExtension _safelyEndUsingWithProcessAssertion:continuation:]_block_invoke + 116 (NSExtension.m:1670)22 libdispatch.dylib 0x00000001bc418610 _dispatch_call_block_and_release + 24 (init.c:1408)23 libdispatch.dylib 0x00000001bc419184 _dispatch_client_callout + 16 (object.m:495)24 libdispatch.dylib 0x00000001bc3c5404 _dispatch_lane_serial_drain$VARIANT$mp + 608 (inline_internal.h:2484)25 libdispatch.dylib 0x00000001bc3c5df8 _dispatch_lane_invoke$VARIANT$mp + 420 (queue.c:3863)26 libdispatch.dylib 0x00000001bc3cf314 _dispatch_workloop_worker_thread + 588 (queue.c:6445)27 libsystem_pthread.dylib 0x00000001bc468f98 _pthread_wqthread + 276 (pthread.c:2323)28 libsystem_pthread.dylib 0x00000001bc46bad4 start_wqthread + 8Thread 5 crashed with ARM Thread State (64-bit): x0: 0x0000000104d75c7c x1: 0x00000001bc7d53e7 x2: 0x0000000000000008 x3: 0x00000001bc459e89 x4: 0x0000000000000001 x5: 0x0000000000000001 x6: 0x0000000000000000 x7: 0x0000000000000000 x8: 0x0000000104d75c7c x9: 0x000000016b646288 x10: 0x9e3779b97f4a7c13 x11: 0x00ff000106137c00 x12: 0x00000001061389c0 x13: 0x000001a202d463c9 x14: 0x00000000000000d2 x15: 0x0000000000000072 x16: 0x00000001bc459f40 x17: 0x00000001bc649db4 x18: 0x0000000000000000 x19: 0x00000001bc7d53e7 x20: 0x0000000000000008 x21: 0x0000000104d75c7c x22: 0x00000001bc495bb0 x23: 0x0000000104d75c7c x24: 0x00000001f2e77a76 x25: 0x0000000000000000 x26: 0x000000028187c6c0 x27: 0x0000000000000000 x28: 0x000000028187c6c0 fp: 0x000000016b646190 lr: 0x00000001bc550be4 sp: 0x000000016b646170 pc: 0x00000001bc5505d0 cpsr: 0x80000000 esr: 0x92000007 (Data Abort) byte read Translation fault