Session error: Session invalidated unexpetedly

[wrodbard]

iPhone 17 Pro
iOS Version 26.4.2

Great App, love it, suddenly hit an error writing to the tag, though, despite 10's of previous writes working.
I have tried a random selection of tags from the same pack that was previously successful.
Error screenshot attached below:

Anything obvious, or something you can advise I check would be a great help
Thanks in advance
W

[wrodbard]

For additional context, I have closed all other apps, and removed the phone's case, still produces the error.

I have recorded the steps taken, but cannot add the video here