Our application is also crashing. It looks like our stack trace ends somewhere in swift's KeyPath implementation. Looks like in some cases (but not all) when using keypaths iOS 14.5 seems to crash. I haven't found the https://www.github.com/apple/swift PR that seemed to have caused the issue though. Hopefully the next beta will resolve it
FWIW my testing environment is a iPhone 12 Pro Max, iOS 14.5b1 (18E5140k) but we have customer reports of this crashing on iPads and iPhones alike and the crash logs are identical.
adityaayyakad
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