Core NFC: Handling NFCError 203

In testing out the Core NFC API

~ iPhone 7, IOS 13.1,13.2

With the Sample-NFC-Application available at

~ https://developer.apple.com/documentation/corenfc/building_an_nfc_tag-reader_app

I've occasionally gotten an Error, as reported by the Delegate-Callback for when the Reader-Session has invalidated

~ readerSession(_ session: NFCTagReaderSession, didInvalidateWithError error: Error)

of NFCError Code=203 “Session is invalidated due to system resource is unavailable”

Once this error has triggered, it will continue to occur anytime another NFC-Scan is attempted.

The error will then also occur for any other App that tries to use the NFC API

~ e.g. NXP-TagInfo https://apps.apple.com/ca/app/nfc-taginfo-by-nxp/id1246143596

Effectively killing NFC App functionality on the IOS-Device..

The only way to stop this is to Restart the IOS Device.

Here is a Stack-Overflow Post on the issue

https://stackoverflow.com/questions/48172963/how-to-avoid-nfcerror-code-203-session-is-invalidated-due-to-system-resource-is

I'm assuming from the Post, and my own testing that attempting to start another NFC-Scan when one is already in progress

is one of the main factors in causing the error to occur.

My questions are;

1. Are there any other actions that would cause the NFCError 203 to occur?

2. Is there any way to fix the state of the NFC functionality of the IOS-Device once the NFCError 203 error

has occurred, other than restarting the IOS-Device?