How 2.7.5 is making xpub in hardware multisig, cant sign tx

[comor]

Just created multisig using trezor and hw1. Xpubs of this wallet are weird - none match trezor or hw.1 standalone wallets. Can someone explain how this new fancy hardware multsig wallets in 2.7x are done?
Im asking because after sending some coins to this wallet i cant do any tx .
When signing tx i have "failed to compile output" error after pressing trezor button to confirm transaction.

[ThomasV]

answered there: https://www.reddit.com/r/Electrum/comments/57389i/failed_to_compile_output_cant_send_tx_from_trezor/