(bitcoin core) Cannot sign psbt in sequence with a bitcoin-core-only multi-sig setup

Hi

Every wallet is made with bitcoin core, with descriptor wallets.

In computer_1_online, synced bitcoin core 24.0.1, gui:

• I create a psbt from a watch-only wallet (descriptor: xpub1/xpub2/xpub3) of a multi-signature 2_of_3

In computer_2_offline,

• non-synced bitcoin core 23.0.1, gui:
  • when I try to sign the psbt with a wallet with one xprv (descriptor: xprv1, xpub2, xpub3), it shows "Could not sign anymore inputs".
  • when I try to sign the psbt with a wallet with 2 xprv (descriptor: xprv1, xprv2, xpub3), it works.
• non-synced bitcoin core 24.0.1, gui:
  • when I try to load the psbt, it shows the error "Unable to decode psbt readcompactsize() size too large iostream error".

What can I do to sign a psbt in sequence, one xprv at a time?

Thank you.