Old Ambar is missing:
It’s not missing, it is number A1-218 even though in the game they appear both at number A1a-63 and A1-218
That is correct.
Original thread for Old Amber Bug and an explaination of the workaround can be found below.
Does this approach account for the single card discrepancy between my total card count between here and the app? I’ve gone through each set individually at gotten so they’re all perfect except the old amber discrepancy in mythical island which is where the weird duplication/link is so wasn’t sure if that’s what’s causing it vs. an error that’s just not showing up otherwise.
There is another thread with some advanced bugs found.
You may find here some other tips to find missing cards.