Same happen to me.

After i read this https://www.reddit.com/r/TREZOR/comments/8otl8q/how_to_verify_signatures_outside_of_wallettrezorio/.
I think the problem is electrum wallet still not familiar with P2SH.
So, i did some browsing, and found this info : https://bitcoinelectrum.com/creating-a-p2sh-segwit-wallet-with-electrum/.