The team figured out what is happening with this series and it has to do with discarding and those cards not yet being reintroduced for collection.
To be clear, the series is currently sold out. The 97% you see is the amount of cards owned by collectors, the final 3% is the amount of cards discarded by collectors. Because we haven’t yet launched the update to place discards back into circulation, that 3% is unavailable at this time. Once we reintroduce discards for collecting, this problem will be resolved … like you, I am hoping for an update on this soon.
I hope this answers your question, and sorry it means waiting a bit longer to be able to collect this series again. Thanks for understanding. - Joe @ NeonMob