AFAIK there is currently no way to import private keys for segwit addresses from Bitcoin Core to Electrum.
I read (and bookmarked) this 2 days ago:
In the field where you enter the private key, enter
p2wpkh-p2sh: in front of the private key.
For example, do this:
Replace "5blahblah" with your private key.
It should import the correct address
I haven't tested it yet, but if it works, I want to merit him.
The only thing that I know to get your bitcoin out from bitcoin core segwit wallet is via sweeping, but it needs a 3rd party tool
You can find the tool from this site
https://segwitaddress.org/However, I don't know if it's safe or not, but this site already been discussed here
https://bitcointalk.org/index.php?topic=2767422.25Yay! Bingo! It works in Electrum
You saved my ass from weeks of waiting
Thanks guys
How? can you share it with us if how did you import the private key from bitcoin core segwit to electrum?