Can you clarify first of all how you created the Electrum wallet? Electrum will not allow you to generate a P2WPKH-P2SH wallet - you can only restore such a wallet. Further, you can not restore such a wallet from an Electrum generated seed phrase unless you force the seed through as an invalid BIP39 seed phrase. Are these the steps you took? Was the initial Electrum wallet you create legacy or segwit?