Future.Conduit.cancel() crash on iOS 13

We've started seeing following crashes in our logs, they seem to be iOS 13 only and affect mostly users running iOS 13.3.1. Anyone idea what the root cause may be and how to reproduce it?

Code Block Crashed: com.apple.main-thread0  Combine                        0x1bd9e2964 Future.Conduit.cancel() + 1441  Combine                        0x1bd9e299c protocol witness for Cancellable.cancel() in conformance Future<A, B>.Conduit + 202  Combine                        0x1bd9acdec closure #1 in Publishers.SubscribeOn.Inner.cancel() + 1243  libswiftDispatch.dylib         0x1c9f59cf8 thunk for @escaping @callee_guaranteed () -> () + 284  libdispatch.dylib              0x1944d2610 _dispatch_call_block_and_release + 245  libdispatch.dylib              0x1944d3184 _dispatch_client_callout + 166  libdispatch.dylib              0x1944b634c _dispatch_main_queue_callback_4CF$VARIANT$armv81 + 9967  CoreFoundation                 0x1947845e4 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 128  CoreFoundation                 0x19477f5d8 __CFRunLoopRun + 20049  CoreFoundation                 0x19477eadc CFRunLoopRunSpecific + 46410 GraphicsServices               0x19e71f328 GSEventRunModal + 10411 UIKitCore                      0x19888c63c UIApplicationMain + 193612 Scruff                         0x1046369f4 main + 10 (main.swift:10)13 libdyld.dylib                  0x194608360 start + 4

Future.Conduit.cancel() crash on iOS 13
 
 
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