Cannot mint NFT in FAmily more than once + UTXO bug in Studio

[PolestarWx]

Expected behavior

1- I Create a family in studio, I expect to be able to create multiple nft in it and to be able to choose a family previously minted.
2- Studio display all my nft

Bug
1- In Studio, when in create an nft with inside a new family, the family disapear and cannot be slected again.
2- Studio doesn't display my nft

Proof
The previously created family :
https://explorer.avax.network/address/avax1fl5t7ca074ms59pk6a3j5c9h3sz87klt702dux

Only the last created family (empty from any nft) appears, but as indicated on the top, I have 3 collections :

No nft in studio:

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Another bug is sometimes I got invalid UTXO when I try to mint a new family, but I cannot reproduce it when I want to