Crash on ipadOS/iOS 15 when pressing Tab key using hardware keyboard

[jurex]

Reproducible crash on ipadOS/iOS 15 when pressing Tab key multiple times using hardware keyboard (bluetooth, or usb-c)

Environment: iPad Pro 11, iPad OS 15.0.0, Eureka 5.3.3

*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Received a call to becomeFirstResponder while processing a focus update, which is not supported.'
terminating with uncaught exception of type NSException

in Core.swift:

Could be related to the new iOS 15 focus system, or something similar...

[dreymonde]

@jurex were you ever able to find a workaround?

[jurex]

@dreymonde I commented the whole code there:

// hotfix to prevent crashing when pressing tab key on hw keyboard
    open func scrollViewWillBeginDragging(_ scrollView: UIScrollView) {
//        guard let tableView = tableView, scrollView === tableView else { return }
//        tableView.endEditing(true)
    }

don't know if there is any other impact, but the app is not crashing anymore

[dreymonde]

@jurex understood, thanks for answering! Hopefully we'll see a proper fix soon

[trackvia-ios]

Bumping and confirming we are seeing this in our latest environment: iOS 15.2, iPad Pro 12.9 5th gen simulator, Eureka 5.3.3

libc++abi: terminating with uncaught exception of type NSException
*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Received a call to becomeFirstResponder while processing a focus update, which is not supported.'

[mats-claassen]

Hey @trackvia-ios, @jurex, @dreymonde the PR linked above should fix the issue. Sorry for the late fix.
Please report if you still see any related crashes