For example:
Bitcoin Testnet address tb1ppsdp29zhvd0m7rmvn07sqv53eesjllq2w9lk97vy9qck3y37hudsv8kvfp cannot pass the psbt.sign
I checked the code https://github.com/Simplexum/python-bitcointx/blob/master/bitcointx/core/psbt.py#L1027 , seems witness only support v0 keyhash & v0 scripthash